Agatha Christie a long-running character in Christie's works, appearing in 33 novels and 54 short stories. Miss Jane Marple, introduced in the short-story collection "The Thirteen Problems" in 1927, was based on Christie's grandmother and her "Ealing cronies". Both Jane and Gran "always expected the worst of everyone and everything, and were, with almost frightening accuracy, usually proved right." Marple appeared in 12 novels and 20 stories. During the Second World War, Christie wrote two novels, "Curtain" and "Sleeping Murder", intended as the last cases of these two great detectives, Hercule Poirot and Miss Marple. Both books were sealed in a bank
Agatha Christie: And Then There Were None Adventure Company chose the novel "And Then There Were None" as the first game, instead of other Christie novels involving famous detectives Hercule Poirot and Miss Marple, for several reasons. Among them was the popularity of the novel, which would help with marketing; and the island nature of the story which would provide a natural barrier, while allowing more freedom of movement for the players within that confined area. One major obstacle in the development of "And Then There Were None" was gaining the approval of aspects of the game from Chorion, the company which owns the rights to Agatha