Mere Christianity by C. S. Lewis (1952)

Of all the modern Christian apologists, none is featured more prominently in Timothy Keller’s work than C. S. Lewis. Mere Christianity is Lewis’s classic exposition of the Christian faith, written as a book of accessible apologetics to readers in a skeptical society. Much of the tone and content of Keller’s The Reason for God mirrors Lewis’s Mere Christianity.

God Is Not Great by Christopher Hitchens (2007)

Christopher Hitchens was one of the “new atheists” active at the time of The Reason for God’s publication (See: Background). In God Is Not Great, Hitchens offers a general critique of religious beliefs and what he asserts are their negative effects on social, moral, and scientific progress.

The Reason for God: Conversations on Faith and Life (2010)

This short video series, produced as a companion to Timothy Keller’s 2008 book, shows six unscripted sessions between Keller and skeptical inquirers from a variety of backgrounds as they talk together about life, faith, and the existence of God. It offers a direct view of the kind of conversations that served as the background content for the material in The Reason for God. Physical copies of this video series are usually sold with an accompanying discussion guide for use in small group conversations.