The Screwtape Letters by C.S. Lewis
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A masterpiece of satire, this classic has entertained and enlightened readers the world over with its sly and ironic portrayal of human life from the vantage point of Screwtape, a highly placed assistant to "Our Father Below." At once wildly comic, deadly serious, and strikingly original, C. S. Lewis gives us the correspondence of the worldly-wise old devil to his nephew Wormwood, a novice demon in charge of securing the damnation of an ordinary young man. The Screwtape Letters is the most engaging and humorous account of temptation-and triumph over it-ever written.