Atheism
Tyranny of God by Joseph Lewis
Reason: The Only Oracle of Man by Col. Ethan Allen
History of Free Thought in Reference to The Christian Religion by Adam Storey Farrar
Bible Myths and their Parallels in other Religions by T. W. Doane
A History of Freedom of Thought by J. B. Bury
The Necessity of Atheism by David Marshall Brooks
The Mistakes of Jesus by William Floyd
The Truth about Jesus: Is He a Myth? by M. M. Mangasarian
An Apology for Atheism by Charles Southwell
Superstition Unveiled by Charles Southwell
Superstition In All Ages by baron d' Paul Henri Thiry Holbach
The Martyrs of Science, or, The lives of Galileo, Tycho Brahe, and Kepler by Sir David Brewster
The Mysteries of All Nations by James Grant
A Comparative View of Religions by Johannes Henricus Scholten
The Age of Reason by Thomas Paine
The Inquisition by E. Vacandard
The Profits of Religion by Upton Sinclair
The Invention of a New Religion by Basil Hall Chamberlain
A Grammar of Freethought by Chapman Cohen
The World's Sixteen Crucified Saviors; Or, Christianity Before Christ by Kersey Graves
The Martyrs of Science, or, The lives of Galileo, Tycho Brahe, and Kepler by Sir David Brewster
Ancient and Modern Celebrated Freethinkers by Charles Bradlaugh, A. Collins and J. Watts
Atheism in Pagan Antiquity by A. B. Drachmann
Is The Bible Worth Reading, and Other Essays by L. K. Washburn
Modern Atheism Under Its Forms of Pantheism, Materialism, Secularism, Development, and Natural Laws by James Buchanan