Murder On The Orient Express by Agatha Christie

An icy storm halted the luxury train as it approached midnight. It had been bustling with passengers, but only one more the next day. An American tycoon lies dead in his compartment, bleeding from stab wounds to his chest. Having been isolated, Hercule Poirot must identify the killer so he or she can be stopped before he or she strikes again. Christie is credited with creating many unforgettable characters. She is best known for indomitable sleuth Miss Marple, meticulous Belgian detective Hercule Poirot, and so many more. She gives you everything she has written about her most prominent investigator. Hercule Poirot, a Belgian detective, travels by train from Syria to Istanbul (Stamboul) during the winter. The Colonel alone boarding the train is a stranger. Poirot reflects that Mary Debenham is in her late 20s, and looks coolly competent. Except Buthnot takes her permission to sit near her. In a subsequent conversation between Mary and the Colonel, Poirot overhears the latter saying that he wishes Mary was out of this, which seems weird since they just met. 

It's no surprise that Agatha Christie is the best-selling bestselling author of all time. Under a pseudonym she wrote six novels in Love Romance and 66 crime novels, as well as fourteen plays and 14 story collections. Her books have been translated into numerous languages and over a billion have been sold in the English language alone. It is stated that Index Translationum claims she has been translated into 103 languages, making her the most translated author in history. She created Hercule Poirot and Miss Jane Marple, two of the most famous crime fiction characters of all time, and wrote The Mousetrap, the most popular play in concert theater in history.