During a writing career that spanned more than half a century, she created two of the world’s most famous detectives. Hercule Poirot and Miss Jane Marple. The author of 79 novels and short story collections, she was also an accomplished playwright–one of her 14 plays, The Mousetrap, is the longest-running play in history. She published six romantic novels under the pseudonym Mary Westmacott and wrote four non-fiction books, including an autobiography. Several of her books, including Murder on the Orient Express and Death on the Nile, were made into hugely successful films. She died in 1976.