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 Poirot describes this in his final farewell letter to Hastings as the catalyst that prompted him to eliminate the man himself, as Poirot "knew" that his friend was not a murderer and refused to let a man capable of manipulating Hastings in such a manner go on. Detective novelist Ariadne Oliver is Agatha Christie's humorous self-caricature. Like Christie, she is not overly fond of the detective whom she is most famous for creating–in Ariadne's case, Finnish sleuth Sven Hjerson. We never learn anything about her husband, but we do know that she hates alcohol and public appearances and has a