What is the title of C.S. Lewis’s autobiography about his journey from atheism to Christianity?

C.S. Lewis’s autobiography about his journey from atheism to Christianity is Surprised by Joy.

Surprised by Joy was published in 1955. It describes Lewis’s intellectual and spiritual development, including his childhood reading, loss of religious belief, growing interest in mythology, and eventual return to Christianity. The title refers to experiences of intense longing or delight that Lewis connected with what he called “joy.”

The book is not a complete chronological record of every event in Lewis’s life. Instead, it concentrates on the experiences and books that influenced his thinking. Lewis discusses his education, his service in the First World War, and conversations with Christian writers and friends.

Readers sometimes mistake The Pilgrim’s Regress for the autobiography because it also reflects Lewis’s religious concerns. That 1933 work is an allegorical novel, whereas Surprised by Joy is a memoir. A Grief Observed, published under a pseudonym in 1961, addresses bereavement rather than his conversion journey.