LOUIS MARKOS is a professor in English and scholar in residence at Houston Christian University, and holds the Robert H. Ray Chair in Humanities. His many books include On the Shoulders of Hobbits: The Road to Virtue with Tolkien and Lewis, From Achilles to Christ: Why Christians Should Read the Pagan Classics, From Plato to Christ: How Platonic Thought Shaped the Christian Faith, Atheism on Trial, Ancient Voices: An Insider's Look at the Early Church, and more. Believing that "all truth is God's truth," he seeks to measure all human knowledge against the touchstone of orthodox Christian doctrine.