A woman's body is found in the third-floor flat of Friar Mansions, and who should live on the very same block but the perspicacious Hercule Poirot?
Agatha Christie is the most widely published author of all time, outsold only by the Bible and Shakespeare. Her books have sold more than a billion copies in English and another billion in a hundred foreign languages. She died in 1976, after a prolific career spanning six decades.