The Box Office Murders

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

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