Mary Westmacott was the pseudonym used by Dame Agatha Mary Clarissa Christie, Lady Mallowan, (née Miller) who was an esteemed English author. Born on 15 September 1890 in Torquay, Devon, Christie is celebrated for her 66 detective novels and 14 short story collections. However, under the pseudonym Mary Westmacott, she published six novels exploring the complexities of relationships.

Christie's iconic creations include the fictional detectives Hercule Poirot and Miss Marple. Her contributions to literature earned her the title of the "Queen of Crime" and in 1971, she was honored as a Dame (DBE) by Queen Elizabeth II. With more than two billion copies of her novels sold, Christie holds the title of the best-selling fiction writer of all time.

Christie’s works have been widely adapted across various media including television, radio, and stage. Her play, The Mousetrap, holds the world record for the longest initial run in the West End of London since its opening in 1952. Christie’s literary legacy continues to be celebrated worldwide.