Agatha Christie, was an English crime writer of novels, short stories and plays and is best remembered for her detective novels and her successful West End theatre plays. Her works, particularly featuring detectives Hercule Poirot or Miss Jane Marple, have given her the title the 'Queen of Crime' and made her one of the most important and innovative writers in the development of the genre.Christie has been referred to by the Guinness Book of World Records as the best-selling writer of books of all time and the best-selling writer of any kind, along with William Shakespeare.