What was the name of C.S. Lewis’s 1933 allegorical novel about a medieval pilgrim?

The Pilgrim’s Regress was C.S. Lewis’s 1933 allegorical novel about a medieval pilgrim.

The Pilgrim’s Regress: An Allegorical Apology for Christianity, Reason and Romanticism was Lewis’s first published work after his conversion to Christianity. Its central character, John, travels through an allegorical landscape while seeking the object of his desire, called the Island.

Lewis modeled the work partly on John Bunyan’s The Pilgrim’s Progress, but he also used it to dramatize his own intellectual and spiritual development. The book includes figures and places representing philosophical positions, ideologies, and competing accounts of human desire.

The novel can be confused with The Pilgrim’s Progress because of its title and allegorical journey. Bunyan wrote the earlier seventeenth-century classic; Lewis’s book is a twentieth-century work with a strongly autobiographical and philosophical purpose. Lewis later acknowledged that its symbolism was sometimes too private for readers to decode easily.