Books about Christianity -- Controversial literature (sorted alphabetically)
- Letters to Eugenia; Or, A Preservative Against Religious Prejudices baron d' Paul Henri Thiry Holbach
- Letters To Eugenia; Or, A Preservative Against Religious Prejudices baron d' Paul Henri Thiry Holbach
- Profits of Religion: An Essay in Economic Interpretation Upton Sinclair
- Profits of Religion, Fifth Edition Upton Sinclair
- Satires and Profanities James Thomson and G. W. Foote
- Story of My Mind; Or, How I Became a Rationalist M. M. Mangasarian
- Thoughts on the Christian Religion, by a Deist Anonymous
- Toleration and other essays Voltaire
- Versuch einer Kritik aller Offenbarung (German) Johann Gottlieb Fichte
- World's Sixteen Crucified Saviors; Or, Christianity Before Christ Kersey Graves