Following the funeral of Richard Abernethie, his surviving family gather to hear the will. Discussing the man's sudden death, his odd sister, Cora Lansquanet, opines that the matter has been hushed-up very well. After all, she says, he was murdered, wasn't he? Having set the cat amongst the pigeons, Cora herself is found murdered, presumably to ensure she couldn't name her brother's murderer.
Maybe this is not one of Ms Christie's best, but it is a clever puzzle, and there is a strong sense of times changing, as the ancient family prepares to watch their ancestral home pass into the hands of strangers, perhaps to be redeveloped into apartments. As always with Ms Christie's work, the story is full of clues and red-herrings, with every member of the family having something to hide and some motive for the murder. Poirot is fully the equal of everyone, and anyone who tries to deceive his "little grey cells", is wasting their time. This may not be the best of Ms Christie's books, but it is a very satisfying tale.