John Moffatt

But each time, an ABC railway guide is found by the dead bodies, and each time, Poirot is warned in advance by a taunting letter from someone signed 'ABC'. Who is ABC? And can Poirot find out in time to prevent the death of a whole alphabet of victims? The police doubt him and the public are in a state of panic, but Poirot is convinced that the murderer's luck will turn, and sooner or later he will make a crucial mistake. And Poirot will be there...