Which 1933 C.S. Lewis book retells the Christian journey through an allegorical pilgrimage?

The Pilgrim’s Regress is C.S. Lewis’s 1933 allegorical book about a Christian journey.

Published in 1933, The Pilgrim’s Regress: An Allegorical Apology for Christianity, Reason and Romanticism follows a character named John through a symbolic landscape. The structure deliberately recalls John Bunyan’s The Pilgrim’s Progress, but Lewis uses his own locations and encounters to explore Christianity, reason, desire, and competing philosophies.

The book was Lewis’s first published work after his conversion to Christianity. Its subtitle signals that it is not only a religious narrative but also an argument about intellectual and spiritual experience. Lewis later acknowledged that some of its allusions and philosophical vocabulary could make it difficult for readers who did not share his cultural background.

The Pilgrim’s Regress is different from The Great Divorce, a 1945 imaginative theological tale, and from That Hideous Strength, the 1945 final volume of Lewis’s space trilogy. Surprised by Joy, published in 1955, is an autobiographical account of Lewis’s intellectual and religious development rather than an allegorical pilgrimage.