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 the house; the English were of all kinds". Christie published relatively few non-fiction works: Often referred to as the "Queen of Crime" or "Queen of Mystery", Agatha Christie is the world's best-selling mystery writer and is considered a master of suspense, plotting, and characterisation. Some critics, however, have regarded Christie's plotting as superior to her skill with other literary elements. Novelist Raymond Chandler criticised her in his essay "The Simple Art of Murder", and American literary critic Edmund Wilson was dismissive of Christie and the detective fiction genre generally in his "New Yorker" essay, "Who Cares Who Killed Roger Ackroyd?"