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

The C.S. Lewis book featuring the demon uncle Screwtape advising Wormwood is The Screwtape Letters. It presents spiritual and moral observations through a fictional series of letters.

Screwtape is an experienced tempter, while Wormwood is his inexperienced nephew and apprentice. Their correspondence discusses how to exploit distraction, vanity, resentment, fear, and false ideas about pleasure. Because Screwtape speaks from the viewpoint of evil, Lewis’s moral lessons are delivered through irony rather than direct instruction.

The book was first published in 1942 and became one of Lewis’s best-known works. Its letter format makes it especially easy to recognize, distinguishing it from Lewis’s essay collections and narrative novels. The work is also sometimes mistaken for a conventional demon story, but its central purpose is satirical and theological.

Lewis later published a related piece, “Screwtape Proposes a Toast,” which expands the same fictional perspective. That later text is associated with the original book but is not its title or first publication.