Which C.S. Lewis autobiography recounts his movement from atheism toward Christianity?

Surprised by Joy is C.S. Lewis’s autobiography recounting his movement from atheism toward Christianity.

Published in 1955, Surprised by Joy describes Lewis’s intellectual and spiritual development. It traces childhood experiences, his education, literary influences, military service, and the changing beliefs that led him first toward theism and later toward Christianity.

Lewis discusses the intense longing he called “Joy,” a form of desire or Sehnsucht associated with moments of beauty and imagination. He presents this longing as an important feature of his spiritual journey, while also describing conversations with fellow scholars, including J.R.R. Tolkien and Hugo Dyson.

The book is an autobiography rather than a complete diary or a systematic theological argument. Lewis’s later Christian writings address belief more directly, while Surprised by Joy concentrates on the story of his conversion and the experiences he believed prepared him for it.