The Red House Mystery

The Red House Mystery is a "e;locked room"e; whodunnit by A. A. Milne, published in 1922. It was Milne's only mystery novel. The setting is an English country house, where Mark Ablett has been entertaining a house party consisting of a widow and her marriageable daughter, a retired major, a wilful actress, and Bill Beverley, a young man about town. Mark's long-lost brother Robert, the black sheep ...