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Free thought

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• Free thought -- Biography
• Free thought -- Early works to 1800
• Free thought -- History
• Free thought -- Juvenile fiction
• Free thought -- Periodicals

• Freethought
• Thought, Free

• The Value of Free Thought: How to Become a Truth-Seeker and Break the Chains of Mental Slavery (Girard, KS: Haldeman-Julius Publications, c1944), by Bertrand Russell (page images at HathiTrust; US access only)
• Ingersoll the Magnificent (New York: Freethought Press Association, 1957), by Joseph Lewis and Robert Green Ingersoll (page images at HathiTrust)
• A Defence of Free-Thinking in Mathematics, by George Berkeley (in Ireland)
• A Few Words About the Devil, and Other Biographical Sketches and Essays (New York: A. K. Butts and Co., 1874), by Charles Bradlaugh
  • Gutenberg text and illustrated HTML
  • page images at HathiTrust
• Flowers of Freethought, by G. W. Foote (HTML at Freethought Archives)
• Is the Bible Worth Reading? And Other Essays, by L. K. Washburn (HTML at infidels.org)
• Men, Women and Gods, and Other Lectures, by Helen H. Gardener (HTML at infidels.org)
• The Mistakes of Jesus, by William Floyd (HTML at infidels.org)
• The Nemesis of Faith (London: J. Chapman, 1849), by James Anthony Froude (multiple formats at archive.org)
• Searching for Truth (second edition; New York: Peter Eckler, c1902), by George Otis Draper (multiple formats at archive.org)
• Some Remarks on Mr. Walton's Appendix Which He Wrote in Reply to the Author of the Minute Philosopher, Concerning Motion and Velocity (1736), by John Hanna (PDF and other formats in Ireland)
• Why I Quit Going to Church, by Rupert Hughes (HTML at infidels.org)
• The Ten Commandments (c1946), by Joseph Lewis (HTML at Wayback Machine)
• The Tyranny of God (seventh edition; New York: Freethought Press Association, 1943), by Joseph Lewis (Gutenberg text and illustrated HTML)
• Free Thought and Official Propaganda (New York: B. W. Huebsch, 1922), by Bertrand Russell
  • page images at HathiTrust
  • multiple formats at Google
• Free Thought and Official Propaganda (London: Watts and Co., 1922), by Bertrand Russell
  • Gutenberg text
  • multiple formats at archive.org
• The Berean: A Manual for the Help of Those Who Seek the Faith of the Primitive Church (Putney, VT: Pub. at the Office of the Spiritual Magazine, 1847), by John Humphrey Noyes (multiple formats at archive.org)
• Crimes of Christianity (only volume published), by G. W. Foote and J. M. Wheeler (HTML at Freethought Archives)
• Doubts in Dialogue, by Charles Bradlaugh (HTML at infidels.org)
• English Secularism: A Confession of Belief (US edition of "The Origin and Nature of Secularism...", with new preface; Chicago: Open Court, 1896), by George Jacob Holyoake, contrib. by Paul Carus (multiple formats at archive.org)
• Heresy, its Utility and Morality: A Plea and a Justification (London: Austin and Co., ca. 1870), by Charles Bradlaugh (Gutenberg text)
• Humanity's Gain From Unbelief (reprinted from the North American Review; London: Freethough Pub. Co., 1889), by Charles Bradlaugh (Gutenberg text)
• Is it God's Word?, by Joseph Wheless (text files at infidels.org)
• Lectures of Col. R. G. Ingersoll, by Robert Green Ingersoll
  • Volume I: Gutenberg text
  • Volume II: Gutenberg text
• On the Improvement of the Understanding, by Benedictus de Spinoza, trans. by R. H. M. Elwes (Gutenberg text)
• The Origin and Nature of Secularism: Showing That Where Freethought Commonly Ends Secularism Begins (London: Watts and co., 1896), by George Jacob Holyoake (page images at HathiTrust)
• Some Mistakes of Moses (tenth edition; Washington: C. P. Farrell, 1889), by Robert Green Ingersoll (multiple formats at archive.org)
• Why I Left the Ministry and Became an Atheist, by G. Vincent Runyon (HTML at infidels.org)
• When Were Our Gospels Written? (fourth edition; London: Freethought Pub. Co., 1881), by Charles Bradlaugh (Gutenberg text)
• Alciphron; or, The minute philosopher. In seven dialogues. Containing an apology for the Christian religion, against those who are called free-thinkers. (Dublin, G. Risk, 1732), by George Berkeley (page images at HathiTrust)
• The Underwood-Marples debate : commencing July 20, 1875 and continuing four evenings between B.F. Underwood, Boston, Mass. and Rev. John Marples, Toronto, Ont. / (New York : D.M. Bennett, office of the Truth seeker, Liberal and Scientific Publishing House, 1877), by B. F. Underwood, John T. Hawke, John Marples, and Harry Houdini Collection (Library of Congress) DLC (page images at HathiTrust)
• Career of religious ideas. (New York, D. M. Bennett, 1878), by Hudson Tuttle (page images at HathiTrust)
• Reine Wahrheiten / (Stralsund : [s.n.], 1786), by Johann Jacob Fezer (page images at HathiTrust)
• Lecture on freedom of mind, by the Reverend Henry Wilkes, A.M., and speech of His Excellency the Right Hon. the Earl of Elgin & Kincardine, K. T., &c. [electronic resource] : delivered before the Mercantile Library Association of Montreal, at the opening of the winter's course of lectures of that institution, Nov. 16, 1848. ([Montreal? : s.n.], 1848), by Henry Wilkes and James Bruce Elgin (page images at HathiTrust)
• A history of freedom of thought [electronic resource] / (London : Williams and Norgate ; Toronto, [1913?]), by J. B. Bury (page images at HathiTrust; US access only)
• The moralist. (London, Printed and pub. by R. Carlile, [1823]), by Richard Carlile (page images at HathiTrust)
• Fifty years of freethought : or, a glance at past experience : a Sunday lecture delivered to the Liverpool Branch of the National Secular Society, in Camden Hall, Camden Street, October 29th, 1882 / (London : Watts, [1882]), by William Hitchman (page images at HathiTrust)
• The logic of life, deduced from the principle of freethought / (New York : A.K. Butts & Co., [1870?]), by George Jacob Holyoake (page images at HathiTrust)
• A defense of modern thought [electronic resource] : in reply to a pamphlet by the Bishop of Ontario on "agnosticism" / (Toronto : Hunter, Rose & Co., 1884), by William D. Le Sueur and John Travers Lewis (page images at HathiTrust)
• Vindex again [electronic resource]. ([Ottawa? : s.n., 1884]), by William D. Le Sueur and W. D. Armstrong (page images at HathiTrust)
• The Burgess-Underwood debate : commencing June 29, 1875, at Aylmer, Ontario, and continuing four days, between O.A. Burgess ... and B.F. Underwood ... (New York : D.M. Bennett, 1876), by O. A. Burgess and B. F. Underwood (page images at HathiTrust)
• The youth's liberal guide for their moral culture and religious enlightenment, (Milwaukee, Trayser Bros., 1877), by Hermann Marcus Kottinger (page images at HathiTrust)
• Faith or fact / (New York : Peter Eckler, 1897), by Henry M. Taber and Robert Green Ingersoll (page images at HathiTrust)
• Flowers of freethought : second series / (London : G. Foote, 1894), by G. W. Foote (page images at HathiTrust)
• Flowers of freethought. (London : G. Foote, 1893), by G. W. Foote (page images at HathiTrust)
• A biographical dictionary of freethinkers of all ages and nations (London : Progressive Pub. Co., 1889), by J. M. Wheeler (page images at HathiTrust)
• The limitations of toleration : a discussion between Robert G. Ingersoll, Frederic R. Coudert, Stewart L. Woodford, before the Nineteenth Century Club, of New York, at the Metropolitan Opera House / (New York : Truth Seeker, c1889), by Robert Green Ingersoll, Lisa J. Truth seeker Peck, Frederic R. Coudert, and Stewart L. Woodford (page images at HathiTrust)
• The creed of Christendom : its foundations contrasted with its superstructure / (Boston, Mass. : Houghton, Osgood, & Co., 1879), by William R. Greg (page images at HathiTrust)
• Speeches / (London : B. Bonner, 1895), by Charles Bradlaugh and J. M. Robertson (page images at HathiTrust)
• The Jamieson-Ditzler debate between Prof. W.F. Jamieson, of Chicago, Ill., and Rev. Jacob Ditzler, D.D., of Kentucky, held in Kirksville, Mo., nine evenings--May 20-29, 1878 : synopsis report--official. (New York : D.M. Bennett, [1880?]), by W. F. Jamieson and J. Ditzler (page images at HathiTrust)
• Remarks upon a late Discourse of free-thinking: in a letter to F.H. D.D., (London, Printed for John Morphew, 1713), by Richard Bentley (page images at HathiTrust)
• The church and freethought. (New York, Truth Seeker Co., [1894]), by Franklin Steiner (page images at HathiTrust)
• Some mistakes of Moses / (New York : C.P. Farrell, 1907), by Robert Green Ingersoll (page images at HathiTrust)
• Modern freethought / (London : Sands & Co., 1907), by John Gerard (page images at HathiTrust)
• The gods, (Washington, C. P. Farrell, 1878), by Robert Green Ingersoll (page images at HathiTrust)
• The creed of Christendom : its foundations contrasted with its superstructure / (London : Trubner, 1877), by William R. Greg (page images at HathiTrust)
• Deity analyzed. In six lectures. (New York, Truth Seeker Co., [1890?]), by John R. Kelso (page images at HathiTrust)
• A brief essay about the gods and my friends. (Great Neck, N.Y., Walden Press, 1948), by Louis Aaron Reitmeister (page images at HathiTrust)
• The freethinkers' manual / (Philadelphia, Pa. : Radical Pub. Co., 1902), by John Baur and H. F. Herbert (page images at HathiTrust)
• The gods : and other lectures / (New York : C. P. Farrell, 1889), by Robert Green Ingersoll (page images at HathiTrust)
• Poems of free thought / (San Jose, Calif. : Mercury Steam Print., 1882), by James L. York (page images at HathiTrust)
• God and my neighbor / (Chicago : C.H. Kerr, 1934), by Robert Blatchford (page images at HathiTrust; US access only)
• Lectures : including his letters on The Chinese god. Is suicide a sin? The right to one's life. Etc., etc., etc. / (Chicago : Rhodes & McClure, 1907), by Robert Green Ingersoll (page images at HathiTrust)
• The nemesis of faith. (London, J. Chapman, 1849), by James Anthony Froude (page images at HathiTrust)
• A discourse of free-thinking, occasion'd by the rise and growth of a sect call'd Free-thinkers. (London, 1713), by Anthony Collins (page images at HathiTrust)
• An apology for professing the religion of nature, in the eighteenth century of the Christian era; addressed to the Right Reverend Dr. Watson, Lord Bishop of Landaff. (London, Printed for J. Ridgway, 1789), by David Williams (page images at HathiTrust)
• Republican. (London, R. Carlile [etc.]), by Robert Carlile (page images at HathiTrust)
• The Movement, anti-persecution gazette, and register of progress. (Westport, Conn. : Greenwood Reprint Corp., 1970), by M. Questell Ryall and George Jacob Holyoake (page images at HathiTrust)
• Free thoughts on religion, the church, and national happiness, (London, Printed and sold by T. Jauncy and J. Roberts, 1720), by Bernard Mandeville and B. M. (page images at HathiTrust)
• The free-thinker : or, Essays on ignorance, superstition, bigotry, enthusiasm, craft, &c. : intermixed with several pieces of wit and humour : design'd to restore the deluded part of mankind to the use of reason and common sense : in three volumes. (London : Printed for J. Brindley : R. Montagu : Olive Payne : T. Woodman, 1733) (page images at HathiTrust)
• The Isis. A London weekly publication, (London, D. France, 1832 [1834?]), ed. by Eliza Sharples Carlille (page images at HathiTrust)
• Dagslyset. (Chicago, Ill. : M. Thrane, 1869-1878), by Marcus Møller Thrane, Fritænkerforening (Chicago (Ill.)), and Fremskridsforening (Chicago (Ill.)) (page images at HathiTrust)
• An oration on the gods / (Cairo, Ill. : Daily Bulletin Steam Book and Job Print, 1873), by Robert Green Ingersoll (page images at HathiTrust)
• The evidences of Christianity : a debate / (Cincinnati, Ohio : H. S. Bosworth, 1858), by Alexander Campbell and Robert Owen (page images at HathiTrust)
• Přednášky professora T.G. Masaryka (V Chicagu : Vyd. nákladem Výkonného výboru Svazu svobodomyslných, 1907), by T. G. Masaryk (page images at HathiTrust; US access only)
• A sermon on loyalty; A remonstrance to God; and A sermon on free inquiry. Observations on public worship. (London : J. Watson, [1840]), by Robert Dale Owen (page images at HathiTrust)
• Pamphlets on free thought. (1713-1717) (page images at HathiTrust)
• An address on the influence of the clerical profession : as delivered in the Hall of Science, New York : to which is added, A tract and a warning ; Truth and error ; On the fear of God / (London : J. Watson, 1840), by Robert Dale Owen (page images at HathiTrust)
• The people's press. (Chicago, Ill. : J.B. Lenau,) (page images at HathiTrust)
• Tractatus theologico-politicus : continens dissertationes aliquot, quibus ostenditur libertatem philosophandi non tantum salva pietate, & reipublicae pace posse concedi, sed eandem nisi cum pace reipublicae, ipsaque pietate tolli non posse (Hamburgi [i. e. Amsterdam] : Apud Henricum Kunraht [sic] [i.e. Jan Rieuwertsz], 1670 [i.e. between 1674 and 1679]), by Benedictus de Spinoza (page images at HathiTrust)
• Jo. Laur. Mosheim Vindiciae antiquae Christianorum disciplinae : adversus celeberrimi viri Jo. Tolandi, Hiberni, Nazarenum. ... Accedit de vita, fatis et scriptis Joannis Tolandi commentatio. : Praefationem, qua atheismi calumnia a S. Scriptura depellitur, praemisit J. Franciscus Buddeus .. (Hamburgi : Impensis Viduae Benj. Schilleri & Jo. Christoph. Kisneri, 1722), by Johann Lorenz Mosheim and Joannes Franciscus Buddeus (page images at HathiTrust)
• La fripponerie laïque des pretendus esprits-forts d'Angleterre : ou, Remarques de Phileleuthere de Leipsick sur le discours de la liberté de penser / (A Amsterdam : chez J. Wetstein & G. Smith, 1738), by Richard Bentley, J. Wetstein, and Armand Bolabeleau de la Chapelle (page images at HathiTrust)
• El buen-sentido fundado en la naturaleza / (Lisboa : Impr. Liberal, 1821), by Cura despreocupado and ciudadano S L. M. M. J. (page images at HathiTrust)
• The law of reason : embracing the subjects of Utility of free discussion, elements of metaphysics, philosophical necessity, and principles of materialism; A discourse on the subject of Deity; Selections, from Mirabaud's System of nature, and the Bon sens of the cure Meslier, on the existence and attributes of the Deity; Observations by Wm. Hammon, ... Immortality of the soul, by David Hume, ...also, an Epitome of Mr. Owen's social system, ... Mr. Owen's opinion of Jesus Christ, ... Select poetry, &c. (London, Printed by J. Thompson, 1831), by David Hume, Paul Henri Thiry Holbach, William Hammon, and Robert Owen (page images at HathiTrust)
• El cristianismo al descubierto : ó examen de los principios y effectos de la religion Cristiana / (Paris : Libreria Americana de Rosa, 1837), by Paul Henri Thiry Holbach and Nicolas Antoine Boulanger (page images at HathiTrust)
• The coming creed of the world. Is there not a faith more sublime and blissful than Christianity! A voice crying in the wilderness. (Philadelphia, W.H. Thompson, 1884), by Frederick Gerhard (page images at HathiTrust)
• Lectures of Col. R.G. Ingersoll : including his answers to the clergy, his oration at his brother's grave, etc., etc. : complete. -- (Chicago : Rhodes and McClure, 1904), by Robert Green Ingersoll (page images at HathiTrust)
• Liberty of man, woman and child : lecture / (Albany, N.Y. : The Albany News Co., [1877?]), by Robert Green Ingersoll (page images at HathiTrust)
• Les libres penseurs / (Paris : J. Lecoffre, 1850), by Louis Veuillot (page images at HathiTrust)
• Kristendomen och den fria tanken; en kritiskt historisk framställning. (Stockholm, Björck & Börjesson, [1908]), by Anton Kristen Nyström (page images at HathiTrust; US access only)
• False claims : an address delivered before the New York Freethinkers' Association at Rochester, N. Y., Sept. 1, 1883 / (New York : Truth Seeker, [1883?]), by John E. Remsburg (page images at HathiTrust)
• The trail of a truth seeker. (Hubbard, O., N.E. Tully, [c1927]), by Norman Ernest Tully (page images at HathiTrust; US access only)
• Researches in oriental history, embracing the origin of the Jews, the rise and development of Zoroastrianism, and the derivation of Christianity; (Rockford, Ill., The author, [c1890]), by George W. Brown (page images at HathiTrust)
• The infidel's text-book [microform], being the substance of thirteen lectures on the Bible. (Boston, J. P. Mendum, 1881), by Robert Cooper (page images at HathiTrust)
• Radical discourses on religious subjects [microform] : delivered in Music Hall, Boston, Mass. / (Boston : W. Denton ; W. White [distributor], c1872), by William Denton (page images at HathiTrust)
• A short history of freethought, ancient and modern [microform]. (London, Watts & Co., 1915), by J. M. Robertson (page images at HathiTrust)
• Podrobná zpráva / (V Praze : Nákl. Volné myšlenky, 1908), by International Free Thought Congress (1907 : Prague) and Julius Myslík (page images at HathiTrust; US access only)
• An inquiry into the nature of responsibility : as deduced from savage justice, civil justice, and social justice / (Birmingham : J. Guest, [1840?]), by T. Simmons Mackintosh (page images at HathiTrust)
• A retrospect of the religious life of England; or, The church, Puritanism, and free inquiry. (London, J. Chapman, 1853), by John James Tayler (page images at HathiTrust)
• Le monopole de l'abrutissement officiel / (Paris : Édition du Groupe d'études scientifiques, 1909), by Paraf-Javal and Paraf-Javal. Libre examen. Selections (page images at HathiTrust; US access only)
• La libre-pensée et ses martyrs : petit dictionnaire de l'intolérance cléricale. (Paris : Librairie de propagande socialiste et anticléricale, 1904-), by Maurice Barthélemy (page images at HathiTrust; US access only)
• Infidelity : its aspects, causes and agencies ; being the prize essay of the British Organization of the Evangelical Alliance / (London : Partridge and Oakey, 1853), by Thomas Pearson (page images at HathiTrust)
• Ten thousand dollars wanted from Col. Robert G. Ingersoll, and the reasons why he should pay it : the source of his surprising originality discovered, in a lecture, delivered by Frank I. Jervis, during 1880-1881. (Chicago : [s.n.], 1888), by Frank I. Jervis (page images at HathiTrust)
• Men, women and gods, and other lectures / (New York : Truth Seeker Co., c1885), by Helen H. Gardener and Robert Green Ingersoll (page images at HathiTrust)
• Uncle Sam's bible, or, The universal diagnosis / (McMinnville, Tenn. : Woodward & Sons, [1895]), by J. Fletcher Woodward (page images at HathiTrust)
• Theism found wanting / (London : Watts, 1920), by Walter Scott Godfrey and J. M. Robertson (page images at HathiTrust; US access only)
• De vrijdenker en zijn ongeloof / (Amsterdam : Dageraads-Boekhandel, 1916), by F. Domela Nieuwenhuis (page images at HathiTrust; US access only)
• Great and mind-liberating thoughts / (Girard, KS : Haldeman-Julius Publications, c1940), by John Mason, contrib. by Haldeman-Julius Company (page images at HathiTrust; US access only)
• Congrès de Paris, 3,4,5,6,7 Septembre 1905 au palais du Trocadéro. Compte rendu. (Paris, [1905]), by France) International Freethought Congress (1905 : Paris (page images at HathiTrust; US access only)
• Primera conferencia acerca de moral, ([Quito] Imp. de la Sociedad Gutenberg, [1905?]), by Roberto Andrade, Ricardo Félix, and B. Rosendo Uquillas (page images at HathiTrust; US access only)
• Creeds not for secularists / (New York : Truth Seeker Company, [1906]), by William Birney (page images at HathiTrust)
• Spinoza, Theologisch-politischer Traktat / (Leipzig : F. Meiner, 1922), by Benedictus de Spinoza and Carl Gebhardt (page images at HathiTrust; US access only)
• Sixteen saviours or one? : The Gospels not brahmanic / (Cincinnati : Thomson, 1879), by John T. Perry and Kersey Graves (page images at HathiTrust)
• Human gods, (Philadelphia, Dorrance and Company, [c1939]), by Ben Harris (page images at HathiTrust; US access only)
• Woman and Christianity, the subjection and exploitation of a sex / (London : The Pioneer Press, 1919), by Chapman Cohen (page images at HathiTrust)
• The ethic of freethought and other addresses and essays (London : Adam and Charles Black, 1901), by Karl Pearson (page images at HathiTrust)
• The Bible of Bibles : or, Twenty-seven "Divine revelations:" containing a description of twenty-seven bibles, and an exposition of two thousand Biblical errors in science, history, morals, religion, and general events; also a delineation of the characters of the principal personages of the Christian Bible, and an examination of their doctrines / (Boston : Colby & Rich, 1879), by Kersey Graves and Lydia M. Graves (page images at HathiTrust)
• Reminiscences of Charles Bradlaugh / (London : Progressive Publishing Company, 1891), by G. W. Foote (page images at HathiTrust)
• The Free Religious Association its twenty-five years and their meaning : an address for the twenty-fifth anniversary of the association, at Tremont Temple, Boston, May 27th, 1892 / (Boston : Free Religious Association of America, 1892), by William J. Potter (page images at HathiTrust)
• Ruled by the tomb a discussion of free thought and free love, (Chicago, Harman, [1898]), by Orford Northcote (page images at HathiTrust)
• Some mistakes of Moses / (Washington, D.C., C.P. Farrell, 1880), by Robert Green Ingersoll (page images at HathiTrust)
• Theology, (Princeton, N.J. Evangelical Reform Publication Co., 1887), by John Miller (page images at HathiTrust)
• An inquiry into the truth of dogmatic Christianity, comprising a discussion with a bishop of the Roman Catholic church, (New York, London, G. P. Putnam's sons, 1893), by William Dearing Harden (page images at HathiTrust)
• Zur 60 jährigen Geschichte der freireligiösen Bewegung / (Gottesberg : Oskar Henkel, 1904), by Gustav Tschirn (page images at HathiTrust; US access only)
• The creed of Christendom : its foundations contrasted with its superstructure / (Toronto : Rose-Belford Publishing Co., 1878), by William R. Greg (page images at HathiTrust)
• The creed of Christendom : its foundations contrasted with its superstructure. (Chicago, Belford, Clarke, 1880), by William R. Greg (page images at HathiTrust)
• The skeptic's defense against all Christian or other priests : being a series of miscellaneous writings having for their main object a comparison of the value of science over religion / (Rochester, N.Y. : Printed for the author, 1895), by Caleb Marshall Landers (page images at HathiTrust)
• The secret of the East : or, The origin of the Christian religion, and the significance of its rise and deline / (Boston : Index association, 1883), by Felix Leopold Oswald (page images at HathiTrust)
• Vorträge von Hedwig Henrich-Welhelmi : (Gehalten in Amerika in den Jahren 1887-1889) ; mit dem Bildniss der Verfasserin ... / (Milwaukee, Wis. : Freidenker, 1889), by Hedwig Henrich Wilhelmi (page images at HathiTrust)
• The creed of Christendom : its foundations contrasted with its superstructure / (London : Trubner, 1875), by William R. Greg (page images at HathiTrust)
• I don't know, do you? (East Aurora, N.Y., The Roycrofters, 1916), by Marilla M Ricker (page images at HathiTrust)
• The candle from under the bushel (Luke xi, 33) ; or, Thirteen hundred and six questions to the clergy and for the consideration of others / (New York : Truth Seeker Co., c1889), by William Hart (page images at HathiTrust)
• From old to new. A sketch of the present religious position. In eight lectures. (London, Longmans, Green, and co., 1872), by F. Reginald Statham (page images at HathiTrust)
• Men, women and gods, and other lectures / (New York : Belford, Clarke & Co., Publishers, [1885]), by Helen H. Gardener and Robert Green Ingersoll (page images at HathiTrust)
• Unbelief in the nineteenth century : a critical history / (London : R. Culley, [1907]), by Henry C. Sheldon (page images at HathiTrust; US access only)
• Some mistakes of Moses / (New York : Freethought Press Assn., [1879]), by Robert Green Ingersoll (page images at HathiTrust)
• Der Idisher goṭ un religyon : loyṭ toyres̀ Moyshe un di iḳarim. (Bruḳlin : Ḥevre dorshey emes̀, 1907), by Jacob Netter (page images at HathiTrust)
• Essays on the work entitled Supernatural religion / (London ; New York : Macmillan, 1893), by Joseph Barber Lightfoot (page images at HathiTrust)
• God, man, and the Bible : three nights' discussion, between the Rev. Joseph Baylee, D.D., and Mr. C. Bradlaugh, held on Wednesday, Thursday, and Friday, June 27th, 28th, and 29th, 1860, at the Teutonic Hall, Liverpool. (London: Austin & Co. ..., [1860]), by Joseph Baylee and Charles Bradlaugh (page images at HathiTrust)
• The creed of Christendom: its foundations and superstructure. (London, Trüber & Co., 1883), by William R. Greg (page images at HathiTrust)
• Men, women, and gods, and other lectures / (New York : Truth Seeker, c1885), by Helen H. Gardener and Robert Green Ingersoll (page images at HathiTrust)
• The Reasoner [electronic resource] (London : J. Watson, 1846-1861), by John Burns, George Jacob Holyoake, and Universal Community Society of Rational Religionists (page images at HathiTrust)
• Occasional thoughts of Horace Seaver. From fifty years of free thinking. (Boston : J.P. Mendum, 1888), by Horace Seaver (page images at HathiTrust)
• The eliminator; or, Skeleton keys to sacerdotal secrets. (Philadelphia : Printed for the author by J.B. Lippincott company, 1894 [c1892]), by Richard Brodhead Westbrook (page images at HathiTrust)
• Roots : a plea for tolerance. (London : R. Bentley, 1873), by George Robert Charles Herbert Pembroke (page images at HathiTrust)
• Appetites and passions; their origin, and how to cast them out. (New York : A.J. Davis, 1863), by Andrew Jackson Davis (page images at HathiTrust)
• Commentaries on Hebrew and Christian mythology / (New York : P. Eckler, c1896), by Parish B. Ladd (page images at HathiTrust)
• La liberté de la pensée. (Paris : [s.n.], 1911), by Gérard de Lacaze-Duthiers (page images at HathiTrust; US access only)
• Appendix to the Theological works of Thomas Paine. (London, Printed and published by M.A. Carlile, 1820), by Thomas Paine (page images at HathiTrust)
• Flowers of freethought. (London, R. Forder, 1893), by G. W. Foote (page images at HathiTrust)
• The freethinker's catechism / (New York : The Truth Seeker Co., [1880?]), by Edgar Monteil (page images at HathiTrust)
• Religion and the Bible. (New York : The Truth seeker company, [©1894]), by F. D. Cummings (page images at HathiTrust)
• Unbelief in the nineteenth century ; a critical history. (New York : Eaton & Mains; Cincinnati : Jennings & Graham, [©1907]), by Henry C. Sheldon (page images at HathiTrust)
• Víra a věda : deset rozprav svobodomyslných / (Chicago : A. Geringer, 1902), by Josef Jiří Král (page images at HathiTrust)
• The laws relating to blasphemy and heresy : an address to freethinkers / (London : Freethought Pub. Co., [1878]), by Charles Bradlaugh (page images at HathiTrust)
• The creed of Christendom [electronic resource] : its foundations contrasted with its superstructure / (Toronto : Rose-Belford Pub. Co., 1878), by William Rathbone Greg (page images at HathiTrust)
• A history of freedom of thought, (London, Oxford University Press, [1913]), by J. B. Bury (page images at HathiTrust; US access only)
• Exposʹe of religious fraud : who, what, when, where / by L.F. Schrader. (Boston : Meador Pub. Co., [c1944]), by L. F. Schrader (page images at HathiTrust)
• Am I an atheist or an agnostic? : a plea for tolerance in the face of new dogmas / (Girard, Kan. : Haldeman-Julius Pubs, 1949), by E. Haldeman-Julius, E. A McDonald, and Bertrand Russell (page images at HathiTrust; US access only)
• Does atheism rest its case on logic? / ([Girard, Kan.] : Haldeman-Julius Co., c1936), by Joseph McCabe and E. Haldeman-Julius, contrib. by Haldeman-Julius Company (page images at HathiTrust; US access only)
• Considerations respecting the recognition of friends in another world; on the affirmed descent of Jesus Christ into hell: on phrenology in connextion with the soul, and on the existence of a soul in brutes. (Philadelphia, G. S. Appleton: New York, Appleton & co., 1845), by John Redman Coxe (page images at HathiTrust)
• Remarks upon a late Discourse of free-thinking: in a letter to N.N., (London, W. Thurlbourn, 1737), by Richard Bentley (page images at HathiTrust)
• The one test of character. (New York : Ross & Tousey, 1860), by Gerrit Smith (page images at HathiTrust)
• The absurdities of the Christian religion / ([Girard, Kan.] : Haldeman-Julius Co., c1936), by Joseph McCabe and E. Haldeman-Julius, contrib. by Haldeman-Julius Company (page images at HathiTrust; US access only)
• Pocket theology. (New York, Truth Seeker Co., [1914?]), by Voltaire (page images at HathiTrust)
• S. Ludvigh's Reden, Vorlesungen und prosaische Aufsaetze, im gebiete der Religion, Philosophie und Geschichte. (Baltimore, Verlag des Verfasser, 1850), by Samuel Ludvigh (page images at HathiTrust)
• Reason or faith--which shall prevail? / ([Girard, Kan.] : Haldeman-Julius Co., c1936), by Joseph McCabe and E. Haldeman-Julius, contrib. by Haldeman-Julius Company (page images at HathiTrust; US access only)
• A critical review of the latest claims that are supposed to give validity to the idea of God / ([Girard, Kan.] : Haldeman-Julius Co., c1936), by Joseph McCabe and E. Haldeman-Julius, contrib. by Haldeman-Julius Company (page images at HathiTrust; US access only)
• Joseph McCabe, fighter for freethought : fifty years on the rationalist front / (Girard, Kansas : Haldeman-Julius Publications, 1936), by Isaac Goldberg, E. Haldeman-Julius, and Joseph McCabe, contrib. by Haldeman-Julius Company (page images at HathiTrust; US access only)
• Upton Sinclair finds God / ([Girard, Kan.] : Haldeman-Julius Co., c1936), by Joseph McCabe, E. Haldeman-Julius, and Upton Sinclair, contrib. by Haldeman-Julius Company (page images at HathiTrust; US access only)
• Half-hours with freethinkers / (London : Austin & Co., 1865), by John Watts and Charles Bradleigh (page images at HathiTrust)
• Religio-political physics, or, The science and art of man's deliverance from ignorance-engendered mysticism, and its resulting theo-moral quackery and governmental brigandage / (New York : C. Blanchard, 1861), by Calvin Blanchard (page images at HathiTrust)
• The religion of science; or, The art of actualizing liberty, and of perfecting and satisfactorily prolonging happiness: being a practical answer to the great question,--"If you take away my religion, what will you give me in its stead?" (New York, C. Blanchard, 1860), by Calvin Blanchard (page images at HathiTrust)
• Letters upon divers subjects in theology : addressed to licentiates, or, candidates, for the gospel ministry and the American youth in general / (Pittsburgh : W.S. Haven, 1854), by William McGirr (page images at HathiTrust)
• Œuvres de Fréret. (A Paris : Chez Jean Servière ; Chez Jean-François Bastien, 1792), by Nicolas Fréret and Louis-Antoine de Bougainville (page images at HathiTrust)
• Deacon Skidmore's letters. Written for the columns of The truth seeker, (New York, D.M. Bennett, [1879]), by De Robigne Mortimer Bennett (page images at HathiTrust)
• Messengers of truth; or, Pills for the pious. ([New York : National Tract Society]), by National Tract Society for the Preservation of the Rights of Conscience and of Free Discussion (page images at HathiTrust)
• America vindicated from European theologico-political and infidel aspersions. (New York, Morgan & Co., 1855), by Thomas J. Vaiden (page images at HathiTrust)
• The evidences against Christianity / (New York : C. Blanchard, 1857), by John S. Hittell (page images at HathiTrust)
• Infidelity : its aspects, causes and agencies ... / (New York : Robert Carter & Bros., 1855), by Thomas Pearson (page images at HathiTrust)
• Drei Drey Fragen. I. Wie entstand die heutige Frey denkery, Maurerey? II. Wie verbreitete sie sich so sehr? III. Wie kann sie unterdrücket werden? ... von einem katholischen Patrioten Deutschlands. (S.l., 1795) (page images at HathiTrust)
• Remarks upon a late Discourse of free-thinking: in a letter to N. N., (London, Printed for W. Thurlbourn, 1737), by Richard Bentley (page images at HathiTrust)
• Infidelity : its aspects, causes and agencies ... / (New York : R. Carter & Bros., 1860), by Thomas Pearson (page images at HathiTrust)
• Theologisch-politischer Traktat / (Leipzig : Dürr, 1908), by Benedictus de Spinoza (page images at HathiTrust; US access only)
• El librepensamiento: doctrinas y hechos. Carta pastoral ... dirige al clero y fieles de la archidiócesis. (Valencia, Gimeno, 1912), by Victoriano Guisasola y Menéndez (page images at HathiTrust; US access only)
• A discourse of free-thinking, occasion'd by the rise and growth of a sect call'd free-thinkers ... (London, 1713), by Anthony Collins (page images at HathiTrust)
• The Christian mythology unveiled, in a series of lectures ... ([London, 1842?]), by Logan Mitchell (page images at HathiTrust)
• Answers to Christian questions and arguments. (New York : The Truth Seeker Co., [between 1880 and 1889?]), by De Robigne Mortimer Bennett (page images at HathiTrust)
• The autobiography of Mr. Bradlaugh : a page of his life. (London : Austin, 1873), by Charles Bradlaugh (page images at HathiTrust)
• The gods, and other lectures. (Peoria, Ill., 1874), by Robert Green Ingersoll (page images at HathiTrust; US access only)
• Age of reason, being an investigation of true and fabulous theology. Part the 1st-[2nd] (New York, G. Vale, 1853), by Thomas Paine (page images at HathiTrust)
• Half-hours with the freethinkers. ([London], 1856-), by John Watts, Anthony Collins, and Charles Bradlaugh (page images at HathiTrust)
• A critical history of free thought in reference to the Christian religion. Eight lectures preached before the University of Oxford. in the year M.DCCC.LXII.. on the foundation of the late Rev. John Bampton ... (New York, D. Appleton and company, 1896), by Adam Storey Farrar (page images at HathiTrust)
• Die Rückständigkeit des modernen Freidenkertums; eine Untersuchung. (Berlin : E. Hofmann, 1905), by Max Steiner (page images at HathiTrust; US access only)
• The nemesis of faith. (London, W. Scott Pub. Co., [1904?]), by James Anthony Froude (page images at HathiTrust)
• The evidences of Christianity : a debate between Robert Owen andAlexander Campbell, containing an examination of the "social system" and all the systems of skepticism of ancient and modern times, held in the city of Cincinnati, in April 1829. (Nashville : McQuiddy Print. Co., 1912), by Robert Owen and Alexander Campbell (page images at HathiTrust)
• A critical history of free thought in reference to the Christian religion. : Eight lectures preached before the University of Oxford. in the year M.DCCC.LXII.. on the foundation fo the late Rev. John Bampton ... / (New York : D. Appleton and company, 1891), by Adam Storey Farrar (page images at HathiTrust)
• The freethinker's text-book. (London, Freethought Pub. Co., [187-?]), by Charles Bradlaugh and Annie Besant (page images at HathiTrust)
• The works of Robert G. Ingersoll in twelve volumes. (New York : Dresden ; C.P. Farrell, 1907-1911, c1901-c1911), by Robert Green Ingersoll and Herman E. Kittredge (page images at HathiTrust)
• A critical history of free thought in reference to the Christian religion : eight lectures preached before the University of Oxford, in the year M.DCCC.LXII., on the foundation of the late Rev. John Bampton / (New York : D. Appleton, 1864), by Adam Storey Farrar (page images at HathiTrust)
• The life and immortality of man. An argumental lecture, (New York, P. Eckler, [c1898]), by Albert Gibbs Gabrielle (page images at HathiTrust)
• La libre pensée, intellectuelle, morale, sociale. (Paris, Librairie de "La Raison,", 1905-), by 1905 : Paris) Congrès de l'Association nationale des libres penseurs de France (July (page images at HathiTrust; US access only)
• The futility of prayer / (London : Freethought Pub. Co., 1879), by G. W. Foote (page images at HathiTrust)
• Qu'est-ce que la théophilanthropie. (Paris, Aux bureaux du journal La Libre Conscience, 1868), by J.-B. Chemin-Dupontès and Henri Carle (page images at HathiTrust)
• A reply to Apeleutherus ... : In which his arguments to prove that sabbaths, ministers, and public worship, are useless and ought to be abolished, are examined and refuted. / (London: : Printed for the author, and sold by R. Hunter (successor to Mr. Johnson) ..., 1819), by John Bentley (page images at HathiTrust)
• Popular tracts / (New-York : Published at the office of the Free Enquirer [by Robert Dale Owen], 1830), by Antoine Vieira, John Neale, Frances Wright, and Robert Dale Owen (page images at HathiTrust)
• Syntagma of the evidences of the Christian religion. (London, Printed for the Author, and published by R. Carlile, 1828), by Robert Taylor (page images at HathiTrust)
• Theologisch-politische abhandlungen (München, J.A. Finsterlin, 1826), by Benedictus de Spinoza, trans. by J. A. Kalb (page images at HathiTrust)
• A review of the evidences of Christianity; in a series of lectures, delivered in Broadway hall, New York, August, 1829. To which is prefixed, an extract from Wyttenbach's Opuscula, on the ancient notices of the Jewish nation previous to the time of Alexander the Great. (Boston, Office of the Investigator, 1831), by Abner Kneeland and Daniel Albert Wyttenbach (page images at HathiTrust)
• The inquirer's text-book : being the substance of thirteen lectures on the Bible / (Boston : J.P. Mendum, [pref. 1864]), by Robert George Cooper (page images at HathiTrust)
• Commentaries on Hebrew and Christian mythology / (New York : The Truth Seeker Co., c1896), by Parish B. Ladd (page images at HathiTrust)
• Theologisch-politische Abhandlung ... (Berlin, L. Heimann, 1870), by Benedictus de Spinoza and J. H. von Kirchmann (page images at HathiTrust)
• Speeches by Charles Bradlaugh / (London : Watts, [189-?]), by Charles Bradlaugh and J. M. Robertson (page images at HathiTrust)
• Christianity and common sense. (London : Longman, Green, Longman, Roberts, & Green, 1863), by Willoughby Jones (page images at HathiTrust)
• Interview with the devil / (London : R. Forder, 1893), by G. W. Foote (page images at HathiTrust)
• Report of the two nights' debate, at Wigan, between Iconoclast [i.e. Charles Bradlaugh] and W. M. Hutchings. (London : Barker, [1861?]), by Charles Bradlaugh and W. M. Hutchings (page images at HathiTrust)
• Vrije gedachte : aanval (Amsterdam : Uitg. Weekblad "De Dageraad,", 1912), by Henrik Schutjes and P. van Dorp (page images at HathiTrust; US access only)
• Was Jesus an impostor? : a discussion between Agnes Rollo Wilkie and Arthur B. Moss / (London : Watts, [18--?]), by Agnes Rollo Wilkie and Arthur B. Moss (page images at HathiTrust; US access only)
• From Christian pulpit to secular platform. (London, Pioneer Press, 1903), by John Lloyd (page images at HathiTrust; US access only)
• Studying the Bible: or, Brief criticisms on some of the principal Scripture texts. (Boston, J.P.Mendum, 1870), by Elmina Slenker (page images at HathiTrust)
• Bible romances / (London : Pioneer Press, [1922]), by G. W. Foote (page images at HathiTrust)
• A dream and its fulfillment : an exposé of the late infidel would-be paradise, Liberal, Barton County, Missouri. ([New York? : C. Braden?, 1887?]), by Clark Braden (page images at HathiTrust)
• Der ṭeologish-poliṭisher ṭraḳṭaṭ / (N.Y. [i.e. New York] : Farlag M. Yanḳoṿiṭsh, [1923]), by Benedictus de Spinoza and N. Perlman (page images at HathiTrust)
• Sketches of modern irreligion and infidelity : with some results of late extensive travels on the continent ; and extracts of letters to an Anglican bishop on the present state of religion there / (London : Seeleys, 1851), by Buchan W. Wright (page images at HathiTrust)
• Freidenker. (Milwaukee : Freidenker Pub. Co., 1885-1942), by Free Thought League of North America (page images at HathiTrust)
• The old faiths perish : an adventure in the logic of belief / (New York ; London : D. Appleton-Century Co., 1939), by Jay William Hudson (page images at HathiTrust; US access only)
• Ideen freisinniger protestantischer Pfarrer in neueren deutschen Romanen / (St. Paul, Minn. : F. Henke, [1919]), by John Ludwig August Huchthausen (page images at HathiTrust)
• Col. Robert G. Ingersoll as he is : a complete refutation of his clerical enemies' malicious slanders : the dishonest statements regarding himself and his family authoritatively denied, and the proof given / (New York [N.Y.] : The Truth Seeker Company, [1896]), by Eugene Montague Macdonald (page images at HathiTrust)
• The clergy a source of danger to the American republic. (Chicago, W. F. Jamieson, 1873), by William F. Jamieson (page images at HathiTrust)
• Arrows of freethought / (London : H.A. Kemp, 1882), by G. W. Foote (page images at HathiTrust)
• The Undewwood-Marples debate : commencing July 20, 1875 and continuing four evenings between B. F. Underwood and Rev. John Marples / (New York : D. M. Bennett, 1877), by B. F. Underwood and John Marplel (page images at HathiTrust)
• Nature suffrage. (Buffalo, American association for the taxation of church property, 1917), by Charles Ralph Mabee (page images at HathiTrust)
• Essays on freethinking and plainspeaking. (London, Longmans, Green and co., 1873), by Leslie Stephen (page images at HathiTrust)
• Faith and free thought : a second course of lectures delivered at the request of the Christian Evidence Society / (New York : A. D. F. Randolph, [1872]), by England) Christian Evidence Society (London (page images at HathiTrust)
• Christianity unveiled : being an examination of the principles and effects of the Christian religion / (New York : [s.n.], 1835), by Paul Henri Thiry Holbach, Nicolas Antoine Boulanger, and W. M. Johnson (page images at HathiTrust)
• Thoughts on the new era of society : a lecture delivered at Mr. Owen's institution ... November 13th, 1831 : on the new era of society / ([London : W. Strange, 1831]), by Charles Rosser (page images at HathiTrust)
• The Investigator. ([London : Hetherington, 1843]), by Charles Southwell (page images at HathiTrust)
• Pleas for free inquiry. (Ramsgate, T. Scott, [1874]), by Trinity College M. A. (page images at HathiTrust)
• Über Religion : im Auftrage des Verfassers aus seinem literarischen Nachlasse / (Wien : R. Löwit, 1924), by Josef Popper-Lynkeus (page images at HathiTrust; US access only)
• Christianity, its evidences, its origin, its morality, its history / (London : R. Forder, 1893), by Annie Besant (page images at HathiTrust)
• 400 years of freethought / (New York : The Truth Seeker Company, 1894), by Samuel P. Putnam (page images at HathiTrust)
• Views of religion, (Boston, Mass., L. K. Washburn, 1906), by Rufus King Noyes (page images at HathiTrust)
• The creed of Christendom : its foundations and superstructure / (New York : C. Blanchard, 1855), by William R. Greg (page images at HathiTrust)
• Debate on the evidences of Christianity; containing an examination of the social system, and of all the systems of scepticism of ancient and modern times, held in the city of Cincinnati, for eight days successively, (London, R. Groombridge;, 1839), by Robert Owen and Alexander Campbell (page images at HathiTrust)
• American heretics and saints, (Boston, Manthorne & Burack, 1938), by Wallace P. Rusterholtz (page images at HathiTrust)
• Dictatorship over the intellect : an affirmation of the right to free thought and to free imaginative experience / (Girard, Kan. : Haldeman-Julius Publications, c1935), by Isaac Goldberg and E. Haldeman-Julius (page images at HathiTrust; US access only)
• Popular Christianity : its transition state and probable development / (London : J. Chapman, 1849), by Frederick J. Foxton (page images at HathiTrust)
• Through agnostic spectacles / (New York : Truth Seeker Co., 1919), by Alexander Kadison (page images at HathiTrust)
• Christianity, a tale and a moral, (New York [Printed by J. J. Little and Ives Company, c1931]), by Peter Fireman (page images at HathiTrust; US access only)
• Theologisch-politische abhandlungen; (Stuttgart, J.F. Steinkopf, 1805), by Benedictus de Spinoza, Carl Philipp Conz, and Christoph Gottlieb von Murr (page images at HathiTrust)
• Moses Mendelssohn und die Denk- und Glaubensfreiheit im Judenthume; mit besonderer Beziehung auf die Confirmation. (Berlin, J. C. Huber, 1859), by Samuel Holdheim (page images at HathiTrust)
• A biographical dictionary of freethinkers of all ages and nations. (London : The Pioneer Press, 1889), by Joseph Mazzini Wheeler (page images at HathiTrust)
• The Freethinker's text-book. (London : Freethought Publishing Co., [18--]), by Annie Wood Besant and Charles Bradlaugh (page images at HathiTrust; US access only)
• Lectures of Col. R.G. Ingersoll; including his Letters on the Chinese god--Is suicide a sin?--The right to one's life--etc. etc. etc. (Chicago, Rhodes & McClure, 1898), by Robert Green Ingersoll (page images at HathiTrust)
• Searching for truth. (London : Watts & Co., 1902), by George Otis Draper (page images at HathiTrust)
• Die Freiheit der Wissenschaft; ein Gang durch das moderne Geistesleben. (Innsbruck : F. Rauch, 1910), by Josef Donat (page images at HathiTrust; US access only)
• The secret of the east : or, the origin of the Christian religion, and the significance of its rise and decline / (New York : The truth seeker company, c1883), by Felix L. Oswald (page images at HathiTrust)
• A trip to Rome, (Lexington, Ky., J. E. Hughes, [1905?]), by J. B. Wilson (page images at HathiTrust; US access only)
• A theologico-political treatise. ([Ann Arbor Edwards Brothers], 1942), by Benedictus de Spinoza (page images at HathiTrust; US access only)
• The trial and imprisonment of J.W. Gett for blasphemy / (Bradford,[Eng.]: Freethought Socialist League, [191-?]), by Ernest Pack and Freethought Socialist League (page images at HathiTrust; US access only)
• A critical history of free thought in reference to the Christian religion. (New York, D. Appleton, 1863), by Adam Storey Farrar (page images at HathiTrust)
• An address on the influence of the clerical profession. As delivered in the Hall of Science, New York. To which is added, A tract and a warning; Truth and error; On the fear of God. (London, J. Watson, 1842), by Robert Dale Owen (page images at HathiTrust)
• A short essay upon free-thinking / (London : Printed for Jonah Bowyer, 1714), by John Addenbrooke (page images at HathiTrust)
• Die krisis in Christentum und die Religion der Zukunft. Ein Weck- und Notruf an unsere Zeit ... (Dresden, E. Pierson, 1908), by Franz Mach (page images at HathiTrust; US access only)
• Die freie religiöse Aufklärung, ihre Geschichte und ihre Häupter. Für denkende Gebildete aller Stände. (Darmstadt, C.W. Leske, 1846), by Hermann von dem Busche (page images at HathiTrust)
• Science et libre pensée. (Paris : Calmann-Lévy, [1905]), by M. Berthelot (page images at HathiTrust; US access only)
• Die Freiheit der Wissenschaft, ein Gang durch das moderne Geistesleben. (Innsbruck, F. Rauch, 1925), by Josef Donat (page images at HathiTrust; US access only)
• Les martyrs de la libre pensée, cours public professé dans la salle du Grand conseil de Genève, (Paris, G. Baillière et cie, 1880), by Jules Romain Barni (page images at HathiTrust)
• XIXme Congrès international, Paris, 15, 16, 17, 18 août 1925. (Bruxelles, Impr. H. Kumps-Robyn, [1925?]), by 19th International Freethought Congress and International Federation of Societies of Free-Thinkers (page images at HathiTrust; US access only)
• The God of fundamentalism and other studies, (Chicago, P. Covici, 1925), by Horace J. Bridges (page images at HathiTrust)
• Alciphron; or, The minute philosopher. In seven dialogues containing an apology for the Christian religion against those who are called free-thinkers. (London : Printed for J. and R. Tonson and S. Draper, 1752), by George Berkeley (page images at HathiTrust)
• Remarks upon a late Discourse of free-thinking: in a letter to N. N., (Cambridge [Eng.] Printed for C. Crownfield, 1725), by Richard Bentley and Francis Hare (page images at HathiTrust)
• Der theologisch-politische Traktat. (Leipzig, P. Reclam, [1886?]), by Benedictus de Spinoza (page images at HathiTrust)
• South Place discourses, 1883-1892., by South Place Ethical Society (London, England) (page images at HathiTrust)
• Flowers of freethought, (London, Pioneer Press, [1893-94]), by G. W. Foote (page images at HathiTrust)
• Six interviews with Robert G. Ingersoll on six sermons by the Rev. T. De Witt Talmage, D. D. To which is added A Talmagian catechism. (Washington, D.C., C. P. Farrell, 1882), by Robert Green Ingersoll and Isaac Newton Baker (page images at HathiTrust)
• The ethic of freethought; a selection of essays and lectures. (London, T. F. Unwin, 1888), by Karl Pearson (page images at HathiTrust)
• La libre-pensée contemporaine : sa nature et ses principales formes / (Paris : H. Oudin, 1885), by Guillaume Canet (page images at HathiTrust)
• Das zeitalter der vernunft; eine untersuchung über wahre und märchenhafte Gottesvorstellung, (Magdeburg-S., Verlag des "N. freirel. (früher Uhlichschen) Sonntagsblattes,", 1890-91), by Thomas Paine (page images at HathiTrust)
• Gotthold Ephraim Lessing, der Apostel der Denkfreiheit. (Leipzig : E. Morgenstern, [pref. 1881]), by Hermann Dederich (page images at HathiTrust)
• Glossen zu Yves Guyot's und Sigismond Lacoix's "Die wahre Gestalt des Christenthums" (Étude sur les doctrines sociales du christianisme) : Nebst einem Anhang : Ueber die gegenwärtige und künftige Stellung der Frau / (Berlin : Expedition des "Vorwärts" : T. Glocke, 1892), by August Bebel, Th Glocke, and Max Bading (page images at HathiTrust)
• Our corner. (London : Freethought), by Annie Besant (page images at HathiTrust)
• The Atheistic platform. : Part II ... (London : Free-thought publishing company, 1884), by George Standring, Charles C. Cattell, Charles Bradlaugh, Annie Besant, and Edward B. Aveling (page images at HathiTrust)
• Catalogue of rare liberal and freethought books to be sold to the highest bidder by mail, closing date for receipt of bids: Monday, June 19, 1950. (New York, [1950?]), by inc Truth Seeker Company (page images at HathiTrust)
• The infidel : freethought and American religion / (Cleveland : World Publishing, 1961), by Martin E. Marty (page images at HathiTrust)
• Christianity cross-examined, (New York, Arbitrator press, [c1941]), by William Floyd (page images at HathiTrust)
• Free thought and official propaganda (New York, B. W. Huebsch, inc., 1922), by Bertrand Russell (page images at HathiTrust)
• Ideen freisinniger protestantischer pfarrer in neueren deutschen romanen, (St. Paul, Minn., F. Henke co., [1920]), by John Ludwig August Huchthausen (page images at HathiTrust; US access only)
• A short history of freethought, ancient and modern, (London : Watts & co., 1906), by J. M. Robertson (page images at HathiTrust)
• Jesus and modern religion, (Chicago, The Open court publishing company; [etc.], 1908), by Edwin A. R. Rumball-Petre (page images at HathiTrust; US access only)
• La Révolution et la libre-pensée : la socialisation de la pensée, 1750-1789, la socialisation de la personne, (1789-1792) la socialisation des biens, (1793-1794). (Paris : Plon, [c1924]), by Augustin Cochin (page images at HathiTrust; US access only)
• The proceedings and addresses at the Freethinkers' Convention held at Watkins, N.Y., (New York, D. M. Bennett, 1878), by Watkins Glen Freethinkers' Convention and New York Freethinker's Association (page images at HathiTrust)
• Remarks upon a late Discourse of free-thinking: in a letter to F. H., D. D., (Cambridge [Eng.] Printed by J. Bentham for W. Thurlbourn; and sold by Knaptons, Manby, and Beecroft, London, 1743), by Richard Bentley and Francis Hare (page images at HathiTrust)
• Bible of reason ... (New York, Wright & Owen, 1831, '28), by Benjamin F. Powell (page images at HathiTrust)
• Problèmes de la libre-pensée. Cinq conférences prononcées à l'aula de l'Université de Genève en mars-avril 1910, (Paris, Fischbacher, 1910), by André Numa Bertrand (page images at HathiTrust; US access only)
• Essays on freethinking and plainspeaking. With introductory essays on Leslie Stephen and his works, (London, Smith, Elder, 1907), by Leslie Stephen, Herbert Woodfield Paul, and James Bryce (page images at HathiTrust)
• Discours sur la liberté de penser, et de raisonner sur les matieres les plus importantes. Ecrit à l'occasion de l'acroissement d'une nouvelle secte d'esprits forts. Ou de gens qui pensent librement. (A Londres, 1717), by Anthony Collins, trans. by Jean Rousset de Missy and Henri Scheurleer (page images at HathiTrust)
• Theological essays. (London, A. and H. Bradlaugh Bonner, 1895), by Charles Bradlaugh (page images at HathiTrust)
• Rome or reason. A memoir of Christian and extra-Christian experiences. (New York, C. P. Somerby, [c1888]), by Nathaniel Ramsay Waters (page images at HathiTrust)
• The Deist, or, Moral philosopher : being an impartial inquiry after moral and theological truths: selected from the writings of the most celebrated authors in ancient and modern times. (London : R. Carlile, 1819), by Richard Carlile (page images at HathiTrust)
• The nemesis of faith / (Chicago : Belfords, Clarke, 1879), by James Anthony Froude (page images at HathiTrust)
• The Christian religion... (N.Y., 1882), by Robert Green Ingersoll (page images at HathiTrust)
• Free thought and official propaganda, delivered at South Place institute on March 24, 1922, ([London] Watts & co. [etc.], 1922), by Bertrand Russell (page images at HathiTrust; US access only)
• The ethic of freethought; a selection of essays and lectures, (London : T. F. Unwin, 1888), by Karl Pearson (page images at HathiTrust)
• Freydenker-lexicon, (Leipzig und Bernburg, C. G. Cörner, 1759), by Johann Anton Trinius and Johann Albert Fabricius (page images at HathiTrust)
• Alciphron: or, The minute philosopher : in seven dialogues : containing an apology for the Christian religion against those who are called free-thinkers ... (London : Printed for J. Tonson ..., 1732), by George Berkeley (page images at HathiTrust)
• La tin des religions. (Paris, E. Flammarion, [1902]), by Auguste Dide (page images at HathiTrust; US access only)
• Alciphron: or. The minute philosopher. In seven dialogues. Containing an apology for the Christian religion, against those who are called free thinkers ... (London, Printed for J. Tonson, 1732), by George Berkeley (page images at HathiTrust)
• Le Rationaliste. ([Genève? : s.n.],) (page images at HathiTrust)
• The freedom of science, (New York, J. F. Wagner, [c1914]), by Josef Donat (page images at HathiTrust)
• The present religious crisis, (New York, G. P. Putnam's sons, 1882), by Augustus Blauvelt (page images at HathiTrust)
• Compte-rendu officiel de la commission du Congrès (Paris, E. Dentu, 1890), by 6th International Free Thought Congress (page images at HathiTrust)
• Discours sur la liberté de penser, (A. Londres, 1766), by Anthony Collins and Jean-Pierre de Crousaz, trans. by Jean Rosset de Missy and Henri Scheurleer (page images at HathiTrust)
• Lettres à Sophie. : Contenant un examen des fondemens de la religion chrétienne, & diverses objections contre l'immortalité de l'ame. (À Londres : [s.n.], Dix-huitieme siècle), by Nicolas Fréret and Paul Henri Thiry Holbach (page images at HathiTrust)
• A retrospect of the religious life of England; or, the church, Puritanism, and free inquiry. (London, Trübner & co., 1876), by John James Tayler and James Martineau (page images at HathiTrust)
• Lectures and essays (a selection) (London, Watts & co., 1905), by Robert Green Ingersoll (page images at HathiTrust)
• The eliminator : or, Skeleton keys to sacerdotal secrets / (Philadelphia : Printed for the author by J.B. Lippincott, 1894), by Richard B. Westbrook (page images at HathiTrust)
• Katalog freigeistiger Literatur. Im Auftrage der Reichs-Arbeitsgemeinschaft der freigeistigen Verbände der Deutschen Republik. (Dresden, J. Rudolph, 1926), by Franz Gollman and Reichsarbeitsgemeinschaft der freigeistigen Verbände (page images at HathiTrust; US access only)
• Dieux et religions : série de conférences de l'Union de libres penseurs et de libres croyants pour la culture morale / (Paris : F. Rieder, 1926), by Gustave Belot and Union de libres penseurs et de libres croyants pour la culture morale (page images at HathiTrust; US access only)
• Freethinker (London, G.W. Foote & Co. [etc.]), by Chapman Cohen, ed. by J. M. Wheeler, G. W. Foote, and Edward B. Aveling (page images at HathiTrust; US access only)
• When Love Is Liberty and Nature Law. (London : W. Reeves, 1893), by John Badcock (page images at HathiTrust)
• Objections to Anarchism. (London : Freedom Press, 1921), by George Barrett (page images at HathiTrust; US access only)
• Objections to Anarchism. (Detroit : Libertarian Group, [19--]), by George Barrett (page images at HathiTrust)
• Der Mensch und das Weltall. (Berlin : Paul Barthol, [19--]), by Paul Barthol (page images at HathiTrust)
• Che Cosa e la Religione. (Chieti, Italia : Editrice C. di Sciullo, 1906), by Ludovico M. Caminita (page images at HathiTrust; US access only)
• Darrow-Starr Debate : "Is the Human Race Getting Anywhere?". (Chicago : Maclaskey and Maclaskey, Shorthand Reporters, 1920), by Clarence Darrow and S. Frederick Starr (page images at HathiTrust; US access only)
• Freethought : is it destructive or constructive? : a symposium / (New York : Truth Seeker Co., c1890), by Robert Green Ingersoll and Truth Seeker Company (page images at HathiTrust)
• God and his book : the Bible : where did we get it, and what is it? / (London : W. Stewart, [18--]), by William Stewart Ross (page images at HathiTrust; US access only)
• Greatest lectures, containing speeches and addresses never before printed outside of the complete works. (New York: Freethought Press Association, 1944), by Robert Green Ingersoll (page images at HathiTrust; US access only)
• Debate on the evidences of Christianity, containing an examination of the "social system" and of all the systems of scepticism of ancient and modern times, (Bethany, Va., A. Campbell, 1829), by Robert Owen and Alexander Campbell (page images at HathiTrust)
• Searching for truth. (New York : P. Eckler, [1902]), by George Otis Draper (page images at HathiTrust)
• The creed of Christendom : its foundations contrasted with its superstructure / (London : Trübner, 1874), by William R. Greg (page images at HathiTrust)
• Truth seeker tracts upon a variety of subjects, by different authors. (New York, D.M. Bennett, Liberal and Scientific Publishing House.), ed. by De Robigne Mortimer Bennett (page images at HathiTrust)
• Alciphron; or, The minute philosopher; in seven dialogues. Containing an apology for the Christian religion, against those who are called free-thinkers, (New Haven, From Sidney's press, for Increase Cooke & co., 1803), by George Berkeley (page images at HathiTrust)
• The Free thought magazine. (Buffalo [etc.], H.L. Green [etc.].) (page images at HathiTrust)
• Science and secularism / (London : Freethought, 1882), by Edward B. Aveling (page images at HathiTrust)
• Departure. (Toledo : Blade printing paper co., 1875), by Thomas Jefferson Rice (page images at HathiTrust)
• A critical history of free thought in reference to the Christian religion : eight lectures preached before the University of Oxford, in the year 1862, on the foundation of John Bampton / (New York : D. Appleton, 1863), by Adam Storey Farrar (page images at HathiTrust)
• Radical discourses on religious subjects. : Delivered in Music hall, Boston, Mass.. (Boston : W. Denton, 1872), by William Denton (page images at HathiTrust)
• Man. (New York [N.Y.] : Asa K. Butts) (page images at HathiTrust)
• The works of Robert G. Ingersoll / (New York : Ingersoll, c1900), by Robert Green Ingersoll and Clinton P. Farrell (page images at HathiTrust)
• A critical history of free thought in reference to the Christian religion / eight lectures preached before the University of Oxford, in the year MDCCCLXII on the foundation of the late Rev. John Bampton, M.A., canon of Salisbury / (London : J. Murray, 1862), by Adam Storey Farrar (page images at HathiTrust)
• An abridgment and review of each chapter of the Bible and Testament: with quotations from the Douay Bible and some eminent writers. (New York, The author, 1847), by Henry Aldworth (page images at HathiTrust)
• The works of Robert G. Ingersoll. (New York, Dresden Pub. Co., C.P. Farrell, 1903 [©1901]), by Robert Green Ingersoll (page images at HathiTrust)
• A history of freedom of thought, (London, Williams and Norgate, [c1913]), by J. B. Bury (page images at HathiTrust; US access only)
• If I were God: a freethinker's faith, incorporating a discussion between the author and a Catholic priest, (New York, The Freethought press association, 1930), by William J. Robinson (page images at HathiTrust)
• Compte-rendu officiel ... (Gand, Société coopérative "Volksdrukkerij", 1905), by 11th International Free Thought Congress and World Union of Freethinkers (page images at HathiTrust; US access only)
• The creed of Christendom : its foundations contrasted with its superstructure / (Boston : J.R. Osgood, 1877), by William R. Greg (page images at HathiTrust)
• Volná myšlenka. (V Praze, Volna myšlenka Československá.), by Julius Myslík (page images at HathiTrust; US access only)
• A grammar of freethought / (London : Pioneer Press, 1921), by Chapman Cohen (page images at HathiTrust; US access only)
• Selected prose works of Shelley / (London : Watts, 1915), by Percy Bysshe Shelley and Henry Stephens Salt (page images at HathiTrust)
• Volná myšlenka. (V Praze, Th. Bartošek [etc.]) (page images at HathiTrust; US access only)
• Humanizing Biblical religion. (New York : Arbitrator press, [1943]), by William Floyd (page images at HathiTrust; US access only)
• The creed of Christendom: (London, Trübner & co., 1875), by William R. Greg (page images at HathiTrust)
• The Republican. (London : R. Carlile [etc.]) (page images at HathiTrust; US access only)
• Free thought pamphlets. ([v. p., 1829-37]) (page images at HathiTrust)
• Report of the International Congress for Progressive Thought : and of the 27th annual Congress of the American Secular Union and Freethought Federation, held in St. Louis, Mo., Oct. 15-20, 1904. (New York : Published for the Union and Federation by the Truth Seeker Co., [1904?]), by International Congress for Progressive Thought (1904 : St. Louis), American Secular Union and Freethought Association, and Congress of the American Secular Union and Freethought Federation (27th : 1904 : St. Louis) (page images at HathiTrust)
• On the progress of liberty of thought during Queen Victoria's reign / (London : Watts, 1902), by C. E. Plumptre (page images at HathiTrust)
• Free thoughts concerning religion : or Nature versus theology / (Rochester, N.Y. : Austin, 1911, c1872), by Andrew Jackson Davis (page images at HathiTrust)
• Rays of reason : or Religion refuted : containing facts and argument tending to prove the fallacy of a belief in religion and the Bible, yet favoring a belief in the existence of a God or ruling power / (Keokuk : Tristate Printing Co., 1887), by William D. Hibbard (page images at HathiTrust)
• Essays on freethinking and plainspeaking / (New York ; London : G.P. Putnam's Sons, 1877), by Leslie Stephen (page images at HathiTrust)
• Man's best friend, or, The evils of pious frauds / (Norwich : R. Walker for the author, 1826), by Sampson Arnold Mackey (page images at HathiTrust)
• The positive creed of freethought : with some remarks on the relation of freethought to socialism : being a lecture delivered at South Place Institute, on Sunday, April 15, 1888 / (London : William Reeves (the New Temple Press), [1888?]), by Karl Pearson (page images at HathiTrust)
• Critical remarks on the truth and harmony of the four gospels : with observations on the instructions given by Jesus Christ, and the doctrines of Christianity / (London : Printed for R. Carlile, 1827), contrib. by Gordon Stein (page images at HathiTrust)
• Is there a life after death? / (New York : Peter Eckler Publishing Co., 1921), by Marshall J. Gauvin (page images at HathiTrust)
• An apology for his resignation of the office of a vice-president of the National Secular Society : addressed in the first instance to the members of the executive of that society / (London : Printed by G. Standring, [1897?]), by James Pinkerton Gilmour (page images at HathiTrust)
• Free thought lectures! and poems! / (San Jose, Calif. : A.S. York, 1888.), by James L. York (page images at HathiTrust)
• La libre-pensée / (Paris : P. Lethielleux, [1908]), by Paul Barbier (page images at HathiTrust; US access only)
• The evidences against Christianity / (San Francisco [Calif.] : J.S. Hittell, 1856), by John S. Hittell (page images at HathiTrust)
• How the United States curtails freedom of thought / (New York : North American Review Pub. Co., c1904), by Ernest Crosby (page images at HathiTrust)
• Handboek van den vrijdenker. (Rotterdam, Commissie van Uitg. F.D.N.-Werken, 1922), by Ferdinand Domela Nieuwenhuis (page images at HathiTrust; US access only)
• The Truth seeker collection of forms, hymns, and recitations. Original and selected. For the use of liberals. (New York, D. M. Bennett, 1877) (page images at HathiTrust)
• The freethinker. (London : G.W. Foote.) (page images at HathiTrust; US access only)
• The Triumph of Evolution : The Anti-Evolutionists Answered. (New York : The Truth Seeker Co., 1925), by Joseph McCabe (page images at HathiTrust)
• Libre Examen. (Paris : Edition du Groupe d'Etudes Scientifiques, 1907), by Paraf-Javal (page images at HathiTrust; US access only)
• Antinatale. (New York : Biblioteca Novatore, 1910), by Libero Tancredi (page images at HathiTrust; US access only)
• Freedom of Thought and of Speech. (Chicago : Charles H. Kerr, 1892), by William Mackintire Salter (page images at HathiTrust)
• Theodore Schroeder's Use of the Psychologic Approach to Problems of Religion, Law Criminology, Sociology and Philosophy : A Bibliography. (Cos Cob, Conn., the author, 1922), by Nancy Eleanor Sankey-Jones (page images at HathiTrust; US access only)
• A Unique Heathen : To Which is Now Added Theodore Schroeder on the Erotogenesis of Religion. A Bibliography. (Cos Cob, Conn., n.p., 1922), by Nancy Eleanor Sankey-Jones and Theodore Schroeder (page images at HathiTrust)
• About the Intellectual Work of Theodore Schroeder. (Cos Cob, Conn., n.p., 1944), by Theodore Schroeder (page images at HathiTrust)
• A Cold Enthusiast. (Riverside, Conn., n.p., 1913), by Hutchins Hapgood (page images at HathiTrust)
• Determinism, Conduct and Fear Psychology. (New York, n.p., 1919), by Theodore Schroeder (page images at HathiTrust)
• The Evolution of Marriage Ideals. (New York : Edwin C. Walker, 1905), by Theodore Schroeder (page images at HathiTrust)
• Intellectual liberty and literary style / (Chicago : [s.n.], 1920), by Theodore Schroeder (page images at HathiTrust)
• Secularism and Religiosity. (N.l., the author, 1945), by Theodore Schroeder (page images at HathiTrust)
• A Discussion of the Social Question. (Milwaukee : National Advance, 1891), by Juliet H. Severance and David Jones (page images at HathiTrust)
• The Gospel According to Malfew Seklew : A Revelation of Revaluations. (Chicago : F.M. Wilkesbarr, 1927), by Malfew Seklew (page images at HathiTrust)
• The Gospel According to Malfew Seklew. (Chicago : Spencella and Winsex, [19--]), by Malfew Seklew (page images at HathiTrust)
• A Lecture on Religious, Political and Social Freedom. (Milwaukee : Godfrey and Crandall, 1881), by Juliet H. Severance (page images at HathiTrust)
• A Lecture on the Evolution of Life in Earth and Spirit Conditions. (Milwaukee : Godfrey and Crandall, 1882), by Juliet H. Severance (page images at HathiTrust)
• Catalogue of Books, Pamphlets, Tracts, etc., Chiefly Political and Controversial : From the Library of the late Edward Truelove. To be sold by his executors. (London, n.p., 1900) (page images at HathiTrust; US access only)
• Voltaire, the Infidel : An Essay on his Work as a Free Thinker, Reformer, and Enemy of Priestcraft. (N.l., n.p., 1880), by Thomas Walker (page images at HathiTrust)
• Biography of Victoria C. Woodhull. (New York : Golden Age, 1871), by Theodore Tilton (page images at HathiTrust)
• Doubts in dialogue / (London : Watts, 1909), by Charles Bradlaugh (page images at HathiTrust)
• A review of the evidences of Christianity ... : to which is prefixed an extract from Wyttenbach's Opuscula on the ancient notices of the Jewish nation previous to the time of Alexander the Great. (Boston [Mass.] : J.P. Mendum, 1887), by Abner Kneeland and Daniel Wyttenbach (page images at HathiTrust)
• Infidel death-beds. "Idle tales of dying horrors", (New York, The Truth seeker company, [1892]), by G. W. Foote (page images at HathiTrust)
• A short history of freethought, ancient and modern. (London : Watts & Co., 1915), by J. M. Robertson (page images at HathiTrust; US access only)
• Works. (New York : The Ingersoll league, 1929), by Robert Green Ingersoll (page images at HathiTrust; US access only)
• A short history of freethought, ancient and modern, (London, S. Sonnenschein & co. ltd.; New York, The Macmillan co., 1899), by J. M. Robertson (page images at HathiTrust; US access only)
• An agnostic looks at life ; challenges of a militant pen (Girard, Kan., Haldeman-Julius company, [c1926]), by E. Haldeman-Julius (page images at HathiTrust)
• Infidelity : its aspects, causes and agencies ... / (New York : R. Carter & Bros., 1854), by Thomas Pearson (page images at HathiTrust)
• The creed of Christendom; its foundations and superstructure. (London : J. Chapman, 1851), by William R. Greg (page images at HathiTrust)
• A short history of freethought : ancient and modern / (New York : G.P. Putnam's, 1906), by J. M. Robertson (page images at HathiTrust)
• Miscellaneous pamphlets, (London, W. Stewart, [188-?-190-?]), by William Steward Ross (page images at HathiTrust)
• Collection of pamphlets about Freemasons and other societies in Ecuador, 1905-1925., by Ecuador (page images at HathiTrust; US access only)
• Essays on freethinking and plainspeaking, (New York and London, G. P. Putnam's sons, 1905), by Leslie Stephen, Herbert W. Paul, and James Bryce (page images at HathiTrust; US access only)
• The works of Robert G. Ingersoll ... (New York, The Dresden publishing co., C. P. Farrell, 1909-11), by Robert Green Ingersoll and Herman Eugene Kittredge (page images at HathiTrust)
• La Pensée italienne au XVIe siècle et le courant libertin / (Genève : Slatkine Reprints, [1969, c1919]), by J.-Roger Charbonnel (page images at HathiTrust; US access only)
• A history of freedom of thought, (New York : Holt, [c1913]), by J. B. Bury (page images at HathiTrust)
• The ethic of freethought and other addresses and essays, (London : A. and C. Black, 1901), by Karl Pearson (page images at HathiTrust)
• The works of Robert G. Ingersoll. (New York, C. P. Farrell, 1900), by Robert Green Ingersoll (page images at HathiTrust)
• Radical rhymes /, by William Denton (page images at HathiTrust)
• What is the Bible? (Chicago, The Open court Pub. Co.; London, K. Paul, Trench, Trübner & co., ltd., 1904), by John Adam Ruth (page images at HathiTrust; US access only)
• A short history of freethought ancient and modern: (London, Watts & co., 1914-15), by J. M. Robertson (page images at HathiTrust; US access only)
• I don't know, do you?, by Marilla M. Ricker (Gutenberg ebook)
• Christianity in relation to Freethought, Scepticism, and Faith: Three discourses by the Bishop of Peterborough with special replies by Mr. C. Bradlaugh, by Charles Bradlaugh and William Connor Magee, contrib. by Robert A. Cooper and Edward Meyrick Goulburn (Gutenberg ebook)
• King Solomon's Goat, by George Willard Bartlett (Gutenberg ebook)
• A Handbook of Freethought: Containing in Condensed and Systematized Form a Vast Amount of Evidence Against the Superstitious Doctrines of Christianity, ed. by W. S. Bell (Gutenberg ebook)
• The Bible of Bibles; Or, Twenty-Seven "Divine" Revelations, by Kersey Graves and Lydia M. Graves (Gutenberg ebook)
• The Project Gutenberg Collection of Works by Freethinkers: With Linked On-line and Off-line Indexes to 157 Volumes by 90 Authors; Plus Indexes to 15 other Author's Multi-Volume Sets., ed. by David Widger (Gutenberg ebook)
• Christianity Unveiled: Being an Examination of the Principles and Effects of the Christian Religion, by Paul Henri Thiry Holbach, trans. by W. M. Johnson (Gutenberg ebook)
• The Freedom of Science, by Josef Donat (Gutenberg ebook)
• The Eliminator; or, Skeleton Keys to Sacerdotal Secrets, by Richard B. Westbrook (Gutenberg ebook)
• Theological Essays, by Charles Bradlaugh (Gutenberg ebook)
• The Works of Robert G. Ingersoll, Complete Contents: Dresden Edition—Twelve Volumes, by Robert Green Ingersoll, ed. by David Widger (Gutenberg ebook)
• The Works of Robert G. Ingersoll, Vol. 12 (of 12): Dresden Edition—Miscellany, by Robert Green Ingersoll (Gutenberg ebook)
• The Works of Robert G. Ingersoll, Vol. 11 (of 12): Dresden Edition—Miscellany, by Robert Green Ingersoll (Gutenberg ebook)
• The Works of Robert G. Ingersoll, Vol. 10 (of 12): Dresden Edition—Legal, by Robert Green Ingersoll (Gutenberg ebook)
• The Works of Robert G. Ingersoll, Vol. 09 (of 12): Dresden Edition—Political, by Robert Green Ingersoll (Gutenberg ebook)
• The Works of Robert G. Ingersoll, Vol. 08 (of 12): Dresden Edition—Interviews, by Robert Green Ingersoll (Gutenberg ebook)
• The Works of Robert G. Ingersoll, Vol. 07 (of 12): Dresden Edition—Discussions, by Robert Green Ingersoll (Gutenberg ebook)
• The Works of Robert G. Ingersoll, Vol. 06 (of 12): Dresden Edition—Discussions, by Robert Green Ingersoll (Gutenberg ebook)
• The Works of Robert G. Ingersoll, Vol. 05 (of 12): Dresden Edition—Discussions, by Robert Green Ingersoll (Gutenberg ebook)
• The Works of Robert G. Ingersoll, Vol. 04 (of 12): Dresden Edition—Lectures, by Robert Green Ingersoll (Gutenberg ebook)
• The Works of Robert G. Ingersoll, Vol. 03 (of 12): Dresden Edition—Lectures, by Robert Green Ingersoll (Gutenberg ebook)
• The Works of Robert G. Ingersoll, Vol. 02 (of 12): Dresden Edition—Lectures, by Robert Green Ingersoll (Gutenberg ebook)
• The Works of Robert G. Ingersoll, Vol. 01 (of 12): Dresden Edition—Lectures, by Robert Green Ingersoll (Gutenberg ebook)
• The Gods: From 'The Gods and Other Lectures', by Robert Green Ingersoll (Gutenberg ebook)
• Mistakes of Moses, by Robert Green Ingersoll (Gutenberg ebook)
• Individuality: From 'The Gods and Other Lectures', by Robert Green Ingersoll (Gutenberg ebook)
• Humboldt: From 'The Gods and Other Lectures', by Robert Green Ingersoll (Gutenberg ebook)
• Heretics And Heresies: From 'The Gods and Other Lectures', by Robert Green Ingersoll (Gutenberg ebook)
• A Grammar of Freethought, by Chapman Cohen (Gutenberg ebook)
• Ludicrous Aspects Of Christianity: A Response To The Challenge Of The Bishop Of Manchester, by Austin Holyoake (Gutenberg ebook)
• Nature and the Gods: From "The Atheistic Platform", Twelve Lectures, by Arthur B. Moss (Gutenberg ebook)
• Is The Bible Worth Reading, and Other Essays, by L. K. Washburn (Gutenberg ebook)
• Comic Bible Sketches, Reprinted from "The Freethinker", by G. W. Foote (Gutenberg ebook)
• Bible Romances, First Series, by G. W. Foote (Gutenberg ebook)
• The Ghosts, and Other Lectures, by Robert Green Ingersoll (Gutenberg ebook)
• Men, Women, and Gods; and Other Lectures, by Helen H. Gardener, contrib. by Robert Green Ingersoll (Gutenberg ebook)
• Reminiscences of Charles Bradlaugh, by G. W. Foote (Gutenberg ebook)
• Arrows of Freethought, by G. W. Foote (Gutenberg ebook)
• Flowers of Freethought (Second Series), by G. W. Foote (Gutenberg ebook)
• Flowers of Freethought (First Series), by G. W. Foote (Gutenberg ebook)
• The Mistakes of Jesus, by William Floyd (Gutenberg ebook)
• The Works of Robert G. Ingersoll, Volume VIII.: Interviews, by Robert Green Ingersoll (Gutenberg ebook)
• Answer to Dr. Priestley's Letters to a Philosophical Unbeliever, by William Hammon and Matthew Turner (Gutenberg ebook)

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