Which C.S. Lewis book records his account of becoming a Christian?

Surprised by Joy records C.S. Lewis’s account of becoming a Christian.

Published in 1955, Surprised by Joy is Lewis’s spiritual autobiography. It describes his childhood, education, changing views of religion, interest in mythology, and movement from atheism toward Christianity. The title refers to Lewis’s idea of “joy,” a powerful longing or desire that he regarded as significant in his intellectual and spiritual life.

Lewis’s conversion was gradual rather than a single simple event. He returned to belief in God in 1930 and became a Christian in 1931. His discussions with fellow Oxford writers, particularly J.R.R. Tolkien and Hugo Dyson, were important in the period surrounding his conversion.

Surprised by Joy is not a complete day-by-day record of Lewis’s life, and it should not be confused with Mere Christianity, which developed from wartime BBC radio broadcasts. The autobiography focuses especially on the experiences and ideas that shaped his faith.