Great book which consists of a series of 31 letters written by a master to his protege to help guide him on attempting to destroy a man.

In Letter VIII, Screwtape explains to his protégé the different purposes that God and the devils have for the human race: "We want cattle who can finally become food; He wants servants who can finally become sons". With this end in mind, Screwtape urges Wormwood in Letter VI to promote passivity and irresponsibility in the Patient: "(God) wants men to be concerned with what they do; our business is to keep them thinking about what will happen to them".