Why Does Everything Come in Threes?: A Short Book about Everything

Doors in the Walls of the World: Signs of Transcendence in the Human Story

Socrates Meets Hume: The Father of Philosophy Meets the Father of Modern Skepticism

Socrates Meets Descartes: The Father of Philosophy Analyzes the Father of Modern Philosophy's

Socrates Meets Machiavelli: The Father of Philosophy Cross-examines the Author of The Prince

Socrates Meets Kant: The Father of Philosophy Meets his Most Influential Modern Child

Socrates Meets Sartre: The Father of Philosphy Cross-Examines the Founder of Existentialism

Socrates Meets Marx: The Father of Philosophy Cross-examines the Founder of Communism

Philosophy

A Refutation of Moral Relativism: Interviews with an Absolutist

How to Destroy Western Civilization and Other Ideas from the Cultural Abyss

The Greatest Philosopher Who Ever Lived

Three Philosophies of Life: Ecclesiastes, Job, and Song of Songs

Forty Reasons I Am a Catholic

Between Allah & Jesus: What Christians Can Learn from Muslims

The Mystery of Joy

Your Questions, God's Answers

Heaven, the Heart's Deepest Longing

Fundamentals of the Faith: Essays in Christian Apologetics

Between Heaven and Hell: A Dialog Somewhere Beyond Death with John F. Kennedy, C. S. Lewis and Aldous Huxley