One of the most influential religious writers of his day, Clive Staples Lewis was an Oxford don and a scholar of medieval literature who loved to debate philosophy at his local pub. In this biography of C.S. Lewis, Alan Jacobs relates the facts and anecdotes of Lewis's life that shaped his thought and writing, from his childhood in Ireland to his horrific experiences in World War I, from his friendship with J.R.R. Tolkien to his late-life marriage to Joy Davidman.