Agatha Christie (1890–1976) was an iconic English crime writer, widely renowned as the "Queen of Crime" and one of the best-selling authors of all time. Her novels have been translated into over 100 languages with billions of copies sold worldwide. She created legendary fictional sleuths, most notably the Belgian detective Hercule Poirot and the sharp elderly amateur Miss Marple. Famous for masterpieces like Murder on the Orient Express and And Then There Were None, her genius lay in crafting intricate plots, ingenious red herrings, and unforgettable twist endings.