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 Nevertheless, he regards the 1893 case in "The Chocolate Box", as his only actual failure of detection. Again, Poirot is not reliable as a narrator of his personal history and there is no evidence that Christie sketched it out in any depth. During his police career Poirot shot a man who was firing from a roof into the public below. In "Lord Edgware Dies", Poirot reveals that he learned to read writing upside down during his police career. Around that time he met Xavier Bouc, director of the Compagnie Internationale des Wagons-Lits. Poirot also became a uniformed director, working on