Hercule Poirot sort of obsessive-compulsive" in Poirot. As mentioned in "Curtain" and "The Clocks", he is fond of classical music, particularly Mozart and Bach. In "The Mysterious Affair at Styles", Poirot operates as a fairly conventional, clue-based and logical detective; reflected in his vocabulary by two common phrases: his use of "the little grey cells" and "order and method". Hastings is irritated by the fact that Poirot sometimes conceals important details of his plans, as in "The Big Four". In this novel, Hastings is kept in the dark throughout the climax. This aspect of Poirot is less evident in the later novels,
Hercule Poirot in literature canon by most fans and biographers. This would render everything else (plays, movies, television adaptations, etc.) as an adaptation, or secondary material. A contradiction between the novels can be resolved, in most cases, by going with the novel that was published first. An example of this would be the ongoing controversy over Poirot's age. Taken at face value it appears that Poirot was over 125 years old when he died. Though the majority of the Hercule Poirot novels are set between World War I and World War II, the later novels then set him in the 1960s (which is contemporary