Peril at End House
Agatha Christie
 Detective Hercule Poirot and Captain Arthur Hastings are holidaying when they meet a young girl, who casually mentions that she has escaped certain death at least thrice. Poirot suspects that somebody is out to get her, and his suspicions prove true. He finds many characters that are shady and may have some reason to kill the girl. Despite Poirot's best efforts, a murder does occur, but not of the intended victim. When the motive itself is unclear, why did the murder take place?