You Can't Keep the Change is a 1940 thriller novel by the British writer Peter Cheyney.

[1] It is the third in his series of novels featuring the London private detective Slim Callaghan, a British version of the increasingly popular hardboiled American detectives.

Slim Callaghan is called to Margraud Manor in Devon where valuable jewels have been stolen.

His investigations take him to a shady nightclub in London haunted by the criminal classes.

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