Which C.S. Lewis novel features the demon Screwtape advising Wormwood?

The C.S. Lewis novel featuring the demon Screwtape advising Wormwood is The Screwtape Letters. Published in 1942, the book is presented as a series of letters from an experienced demon to a younger demon assigned to tempt a human being.

Lewis uses the fictional correspondence to examine temptation, pride, distraction, fear, and self-deception. Screwtape’s advice is deliberately written from a demonic perspective, so the moral lessons emerge through irony rather than through direct sermons by a narrator.

The book is often called a novel, although its epistolary structure makes it different from a conventional narrative. Each section is framed as a letter, and the reader learns about the human “patient” indirectly through Screwtape’s instructions.

The title can be confused with Lewis’s other theological and imaginative works, especially The Great Divorce. However, Screwtape and Wormwood belong specifically to The Screwtape Letters, which became one of Lewis’s most widely read books.