written1940 published 1975
Recommendation: Previous books
Poirot's last case. A rather odd but most ingenious plot in which everything seems rather vague, so much less satisfying than usual because Hastings is left to tie up the loose ends. Also very sad, because Captain Hastings is now a widower, having lost his "Cinders" and at the end he loses his friend Poirot too. But Poirot doesn't really trust Hastings' intelligence so he leaves a letter for him to be opened posthumously explaining the reasoning leading to the person responsible for murder.