A is for Andover -
and Mrs. Ascher battered to death.
B is for Bexhill -
and Betty Barnard strangeld.
C is Sir Carmichael Clarke clubbed and killed.
Beside each body lay a copy of the ABC Railway Guide - open at the relevant page. The police were baffeled. but the murderer had already made a grave mistake. he had challenged Hercule Poirot to unmask him...