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
Hercule Poirot in literature with the time Agatha Christie was writing even though it created minor discrepancies). Many people believe, from her later works, that Poirot retired from police work at around 50, but this is untrue, because as shown in the short story "The Chocolate Box", he retired at around 30. By accepting the date given in "The Chocolate Box" over later novels, which never gave precise ages anyway, it can be explained why Poirot is around for so long. Also the debate over Poirot’s family is fuelled mainly by the fact that he mentions a sister in the original publication of "The