The Cask is a 1920 detective novel by the Irish-born writer Freeman Wills Crofts.

[1] Long after the author's reputation had declined, this book was still hailed by critics as a cornerstone of the genre [2] Crofts had been working as a railway engineer before writing the novel, but its success launched him as one of the leading writers of the Golden Age of Detective Fiction.

He later went on to create the character of Inspector French of Scotland Yard who appeared in a long-running series of novels.

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