Agatha Christie's first novel introduces the characters of Hercule Poirot, Chief Inspector Japp and Captain Arthur Hastings. In the midst of World War I, the residents of Styles wake one morning to find Emily Inglethorpe has been fatally poisoned. Captain Hastings, staying with the family, enlists the help of his old friend, Belgian detective Hercule Poirot. With the evidence mounting against one member of the family, Poirot uses his technique to prove who really killed Emily.

Originally published in English in 1920.