Title: Dialogues Concerning Natural Religion, Author: David Hume
Title: Heretics, Author: G. K. Chesterton
Title: The Varieties of Religious Experience, Author: William James
Title: The Consolation of Philosophy, Author: Boethius
Title: The Evolution of the Idea of God, Author: Grant Allen
Title: What Nietzsche Taught, Author: Willard Huntington Wright