Dame Agatha Mary Clarissa Christie, Lady Mallowan, DBE (née Miller; 15 September 1890 – 12 January 1976) was an English writer. She is known for her 66 detective novels and 14 short story collections, particularly those revolving around her fictional detectives Hercule Poirot and Miss Marple. Christie also wrote the world's longest-running play, a murder mystery, The Mousetrap, and, under the pen name Mary Westmacott, six romances. In 1971 she was appointed a Dame Commander of the Order of the British Empire (DBE) for her contribution to literature.
Christie was born into a wealthy upper-middle-class family in Torquay, Devon. Before marrying and starting a family in London, she had served in a Devon hospital during the First World War, tending to troops coming back from the trenches. She was initially an unsuccessful writer with six consecutive rejections,but this changed when The Mysterious Affair at Styles, featuring Hercule Poirot, was published in 1920.During the Second World War, she worked as a pharmacy assistant at University College Hospital, London, acquiring a good knowledge of poisons which feature in many of her novels.
In 1955, Christie was the first recipient of the Mystery Writers of America's highest honour, the Grand Master Award. Later the same year, Witness for the Prosecution received an Edgar Award by the MWA for Best Play. In 2013, The Murder of Roger Ackroyd was voted the best crime novel ever by 600 fellow writers of the Crime Writers' Association. On 15 September 2015, coinciding with her 125th birthday, And Then There Were None was named the "World's Favourite Christie" in a vote sponsored by the author's estate. Most of her books and short stories have been adapted for television, radio, video games and comics, and more than thirty feature films have been based on her work.
Christie described her childhood as "very happy". She was surrounded by a series of strong and independent women from an early age.
Dame Agatha Christie died on 12 January 1976 at age 85 from natural causes at her home Winterbrook House which was located in Winterbrook, Wallingford, Oxfordshire.