The Box Office Murders is a 1929 detective novel by the Irish-born writer Freeman Wills Crofts.

It is the fifth in his series of novels featuring Inspector French, a prominent figure of the Golden Age of Detective Fiction.

[1] It was published in the United States the same year by Harper under the alternative title The Purple Sickle Murders.

[2] French becomes involved in a case that sees several female cinema box office cashiers die in mysterious circumstances.

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