Agatha Christie: A Hercule Poirot Mystery. Originally titled: The Hollow. From the inside front cover: Is there a Doctor in the house? The night before there ad been one, John Christow-and every person in the weekend party had been keenly aware of his vital presence...his long-suffering wife... his tormented mistress...his beautiful, vengeful former love...not to mention the men whose women he had stolen and whose talents he had dwarfed. But as the day dawned there was an emergency beyond John Christow's formidable skills. Brilliant as he was, he could not sign his own death certificate, nor give the diagnosis: Murder... From the back cover: Recipe for murder. All the ingredients were there.An isolated English country house. A hostess with a taste for staging cruel human dramas. A guest list selected for a perfect blending of love, illicit passion, and burning hate. And as the piece de resistance, a corpse served up by the blood-tinged water of a swimming pool. Here was a homicide to tantalize that gourmet of crime, Hercule Poirot. And a cunning murderer only he could unmask....