Which C.S. Lewis novel features the demonic correspondent Screwtape?

The Screwtape Letters is the C.S. Lewis novel featuring the demonic correspondent Screwtape.

The book is structured as a series of letters from Screwtape, a senior demon, to his inexperienced nephew Wormwood. Screwtape advises Wormwood on how to tempt and mislead a human being. Lewis presents the advice ironically, so that the demons’ language exposes the habits and self-deceptions they are trying to encourage.

The letters first appeared in the British newspaper The Guardian in 1941 and were published as a book later that year. Lewis used an unusual epistolary form rather than a conventional narrative. The work became one of his most influential Christian writings because it examines pride, distraction, fear, and spiritual complacency through satire.

Although the book is often called a novel, it is also commonly described as a satirical theological work. Screwtape is not the intended hero, and the letters do not provide a biography of Satan. The central human character is deliberately left unnamed.