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 story years (25 short stories and only 4 novels). Christie increased her novel production during this time (14 novels, 21 total short stories and one theatre play). Twelve short stories form "The Labours of Hercules". The other short stories listed here take place in this period but were published before and after the publication of "Hercules". The theatre play is named "Black Coffee" and was written by Agatha Christie, who stated a frustration with other stage adaptations of her Poirot mysteries. In 1998, author Charles Osborne adapted the play into a novel. A new detective, Miss Marple, enters the stage