Which C.S. Lewis book was published in 1933 as an allegorical journey toward faith?

The Pilgrim’s Regress was published in 1933 as an allegorical journey toward faith.

It was C.S. Lewis’s first published book after his conversion to Christianity. The full title, The Pilgrim’s Regress: An Allegorical Apology for Christianity, Reason and Romanticism, signals its relationship to John Bunyan’s The Pilgrim’s Progress.

The protagonist, John, travels through a symbolic landscape while encountering figures and ideas representing different philosophies, cultural attitudes, and religious positions. Lewis used the journey to examine his own movement from atheism toward Christian belief, while also defending imagination and reason.

The book is less accessible to many modern readers than Mere Christianity because its allegorical characters depend on debates and intellectual fashions of Lewis’s time. The title is sometimes confused with Bunyan’s earlier Christian allegory, but Lewis’s work is a separate twentieth-century novel.