Dame Agatha Mary Clarissa Christie, (1890 – 1976) was an English crime writer of novels, short stories, and plays. She also wrote six romances under the name Mary Westmacott, but she is best remembered for the 66 detective novels and 14 short story collections she wrote under her own name, most of which revolve around the investigations of such characters as Hercule Poirot, Miss Jane Marple and Tommy and Tuppence. She also wrote the world's longest-running play, The Mousetrap.
According to the Guinness Book of World Records, Christie is the best-selling novelist of all time. Her novels have sold roughly 4 billion copies, and her estate claims that her works rank third, after those of William Shakespeare and the Bible, as the world's most-widely published books.