Featuring Tommy and Tuppence Beresford.

"Tommy and Tuppence Beresford, now retired, move into a house in Devonshire. In an old children's book left in the attic, Tuppence finds cryptic clues to a murder which took place in the village during the First World War. The girl who died was mixed up in an old scandal to do with the passing on of naval secrets. But was she innocent or guilty?
Intrigued, Tommy and Tuppence investigate. But few of those in the village at the time are left alive. And their memories are confused or failing, it was such a long time ago. For the rest, it is all hearsay - often contradictory hearsay at that. Yet from these disconnected items of information, a pattern slowly begins to emerge.
Tommy and Tuppence are on surer ground after Tommy's visit to a Mr Robinson in London. Then Colonel Pikeaway of MI5 takes a hand. Although the murder is such an old one, there are signs that someone is anxious it should not be revived. Suddenly Tommy and Tuppence are in danger, though no one can guess from what source, nor why their raking up of the past should be so bitterly resented. What can it matter now?
Agatha Christie weaves a spellbinding mystery strung between past and present, in which the dog Hannibal plays a considerable part." -- Inside cover.