What is the title of C.S. Lewis’s 1942 book about temptation from a demon’s viewpoint?

C.S. Lewis’s 1942 book about temptation from a demon’s viewpoint is The Screwtape Letters.

The book consists of fictional letters from Screwtape, a senior demon, to his inexperienced nephew Wormwood. The advice concerns how to tempt and distract a human subject known as “the Patient.” Lewis uses the inverted viewpoint to satirize spiritual complacency and expose ordinary moral weaknesses.

The work began as a series of pieces published in the Anglican newspaper The Guardian. Lewis later collected them into book form, with a final section that differs from the correspondence format.

The letters are not a theological manual written from the perspective of demons. Their dramatic device is deliberately ironic: readers are expected to recognize that Screwtape’s advice is morally corrupt and to infer the opposite lesson.