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
Agatha Christie's Poirot that the story was first published in book format in "The Regatta Mystery and Other Stories" (published in the United States in 1939). Although the story is now associated with Parker Pyne, it was included in the 2008 omnibus volume "Hercule Poirot: the Complete Short Stories", which was the first public association of the story with Hercule Poirot since the original Strand Magazine publication of 1936. Aside from "Poirot and the Regatta Mystery", the one authentic Hercule Poirot story not included in any form, whole or partial, in the "Agatha Christie's Poirot" series is the 1930 play "Black Coffee". Although