Which C.S. Lewis book presents letters from the demon Screwtape?

The Screwtape Letters presents letters from the demon Screwtape.

Published in book form in 1942, The Screwtape Letters is structured as correspondence from Screwtape, a senior demon, to his inexperienced nephew Wormwood. The letters offer satirical advice about tempting a human patient and undermining his moral and spiritual life.

Lewis uses the demonic viewpoint as a literary device. The book is not written as a theological manual from the perspective of a trustworthy narrator; instead, its irony requires readers to infer the author’s intended moral lessons from Screwtape’s advice and misunderstandings.

The work began as a series connected with wartime broadcasts and quickly became one of Lewis’s most popular books. It is often confused with The Great Divorce or The Problem of Pain, which are also works of Christian reflection, but neither uses the same epistolary demon narrator.