Agatha Christie was an English author and playwright whose work helped define modern detective fiction. Best known for creating Hercule Poirot and Miss Marple, she turned the mystery novel into a precise art of clues, misdirection, motive, and psychological observation.... Beginning with The Mysterious Affair at Styles, her Poirot books made detection feel theatrical and analytical, while the Miss Marple stories revealed the darkness hidden beneath village respectability. Christie also wrote essential standalones such as And Then There Were None, along with plays and several non-mystery novels under the name Mary Westmacott. Her appeal lies not only in ingenious plots, but in her sharp understanding of vanity, greed, jealousy, fear, and the ordinary human weaknesses that make murder imaginable.