Agatha Christie her service in September 1918. After the war, Agatha and Archie Christie settled in a flat at 5 Northwick Terrace in St. John's Wood, northwest London. Christie had long been a fan of detective novels, having enjoyed Wilkie Collins's "The Woman in White" and "The Moonstone", as well as Sir Arthur Conan Doyle's early Sherlock Holmes stories. She wrote her own detective novel, "The Mysterious Affair at Styles", featuring Hercule Poirot, a former Belgian police officer noted for his twirly large "magnificent moustaches" and egg-shaped head. Poirot had taken refuge in Britain after Germany invaded Belgium. Christie's inspiration for the
Death in the Clouds doors of a library, but the combination of poisoned dart and plane is probably unique. Not that such minor matters are of the slightest consequence to the reader; the main thing is that this is an Agatha Christie story, featuring Hercule Poirot, who is, by his own admission, the world's greatest detective." He concluded, "This is a crime puzzle of the first quality, and a mighty entertaining story besides." In "The Observer"'s issue of 30 June 1935, "Torquemada" (Edward Powys Mathers) started his review, "My admiration for Mrs. Christie is such that with each new book of hers I strain