This is book number 13 in the Hercule Poirot Mysteries (Audio) series.
Now an Amazon Prime original limited series
Agatha Christie's beloved classic The A.B.C. Murders sets Hercule Poirot on the trail of a serial killer.
There's a serial killer on the loose, working his way through the alphabet and the whole country is in a state of panic.
A is for Mrs. Ascher in Andover, B is for Betty Barnard in Bexhill, C is for Sir Carmichael Clarke in Churston. With each murder, the killer is getting more confident--but leaving a trail of deliberate clues to taunt the proud Hercule Poirot might just prove to be the first, and fatal, mistake.