What is the title of C.S. Lewis’s autobiography about his conversion and spiritual development?

C.S. Lewis’s autobiography about his conversion and spiritual development is Surprised by Joy. The book was published in 1955 and describes important stages of his intellectual and religious life.

Lewis recounts his childhood, education, literary influences, service in the First World War, and movement from atheism toward Christianity. He explains the intense longing he called “Joy,” a term he used for a desire awakened by experiences of beauty, myth, and imagination rather than for ordinary happiness.

The autobiography is selective rather than a complete day-by-day account. Lewis became a Christian in 1931 after years of discussion and friendship with people including J.R.R. Tolkien and Hugo Dyson. Surprised by Joy ends before the later public prominence brought by his wartime broadcasts and the Narnia books.