Agatha Christie Before marrying and starting a family in London, she had served in a Devon hospital during the First World War, tending to troops coming back from the trenches. She was initially an unsuccessful writer with six consecutive rejections, but this changed when "The Mysterious Affair at Styles", featuring Hercule Poirot, was published in 1920. During the Second World War, she worked as a pharmacy assistant at University College Hospital, London, acquiring a good knowledge of poisons which feature in many of her novels. "Guinness World Records" lists Christie as the best-selling novelist of all time. Her novels have sold roughly
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