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 of the final episode, only slightly short of the target he had set himself (in a 2007 interview) of completing the entire canon before his 65th birthday. The short stories and novellas "The Submarine Plans", "The Market Basing Mystery", "Christmas Adventure," "The Mystery of the Baghdad Chest," "The Second Gong," "The Incident of the Dog's Ball," and "Hercule Poirot and the Greenshore Folly" were not filmed in their original short story format, as Agatha Christie later rewrote these stories as novellas or novels ("The Incredible Theft", "Murder in the Mews", "The Adventure of the Christmas Pudding", "The Mystery of the