Books by Robert Green Ingersoll (1833~1899)
- About The Holy Bible: A Lecture
- An Oration on the Life and Services of Thomas Paine
- Hell: Warm Words on the Cheerful and Comforting Doctrine of Eternal Damnation
- Heretics And Heresies: From 'The Gods and Other Lectures'
- Humboldt: From 'The Gods and Other Lectures'
- Individuality: From 'The Gods and Other Lectures'
- Ingersollia: Gems of Thought from the Lectures, Speeches, and Conversations of Col. Robert G. Ingersoll, Representative of His Opinions and Beliefs
- Lectures of Col. R. G. Ingersoll - Latest
- Lectures of Col. R. G. Ingersoll, Volume I: Including His Answers to the Clergy, His Oration at His Brother's Grave, Etc., Etc.
- Mistakes of Moses
- Shakespeare: A Lecture
- The Christian Religion: An Enquiry
- The Ghosts, and Other Lectures
- The Gods: From 'The Gods and Other Lectures'
- Thomas Paine: From 'The Gods and Other Lectures'
- Trial of C. B. Reynolds For Blasphemy, at Morristown, N. J., May 1887: Defence
- Walt Whitman: An Address