Poirot Investigations (1924) by Agatha Christie: Elevent short stories featuring eccentric Belgian detective Hercule Poirot who solves mysteries involving revenge, greed and jealousy. Stories include The Kidnapped Prime Minister; The Adventure of the Italian Nobleman; and The Case of the Missing Will. The UK first edition featured an illustration of Poirot on the dust jacket, reprinted from the 21 March 1923 issue of The Sketch magazine. The US edition was published in 1925 with three additional stories. Author Agatha Christie (1890-1976) is best known for her 66 novels and much-loved fictional detective Hercule Poirot. She also wrote the world's longest-running play, The Mousetrap murder mystery.Author Agatha Christie is best known for her 66 novels and much loved fictional detectives Hercule Poirot. She also wrote the world's longest-running play, The Mousetrap.