The ABC Murders is a Hercule Poirot Crime novel. In this adventure Poirot meets a serial killer who sends Poirot letters signed by A.B.C. In each is given the date and location of the next murder. This Poirot novel features also classic sidekick Arthur Hastings.
This is excellent Poirot Novel. Ending will surprice you, even though you know something surprising is going to happen.
Anyone who like classic detective novels.