Books about Christianity -- Controversial literature (sorted by popularity)
- Christianity in relation to Freethought, Scepticism, and Faith Charles Bradlaugh and William Connor Magee 78 downloads
- Frauds and Follies of the Fathers J. M. Wheeler 73 downloads
- The Profits of Religion, Fifth Edition Upton Sinclair 73 downloads
- The Cradle of the Christ: A Study in Primitive Christianity Octavius Brooks Frothingham 71 downloads
- Thoughts on the Christian Religion, by a Deist Anonymous 69 downloads
- Ingersoll in Canada: A Reply to Wendling, Archbishop Lynch, Bystander; and Others Allen Pringle 62 downloads
- Christian Mystery: A Chinese Tale, Found in the Portfolio of a Portuguese Friar Anonymous 60 downloads
- Antikristus: Arvostelukoe kristinopista (Finnish) Friedrich Wilhelm Nietzsche 56 downloads
- Versuch einer Kritik aller Offenbarung (German) Johann Gottlieb Fichte 56 downloads
- Letters to Eugenia; Or, A Preservative Against Religious Prejudices baron d' Paul Henri Thiry Holbach 50 downloads