Appointment with death : Hercule Poirot Series, Book 18

Af Agatha Christie (2010)
Summary: A repugnant Amercian widow is killed during a trip to Petra... Among the towering red cliffs of Petra, like some monstrous swollen Buddha, sat the corpse of Mrs Boynton. A tiny puncture mark on her wrist was the only sign of the fatal injection that had killed her. With only 24 hours available to solve the mystery, Hercule Poirot recalled a chance remark he'd overheard back in Jerusalem: 'You see, don't you, that she's got to be killed?' Mrs Boynton was, indeed, the most detestable woman he'd ever met...
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Summary: A repugnant Amercian widow is killed during a trip to Petra... Among the towering red cliffs of Petra, like some monstrous swollen Buddha, sat the corpse of Mrs Boynton. A tiny puncture mark on her wrist was the only sign of the fatal injection that had killed her. With only 24 hours available to solve the mystery, Hercule Poirot recalled a chance remark he'd overheard back in Jerusalem: 'You see, don't you, that she's got to be killed?' Mrs Boynton was, indeed, the most detestable woman he'd ever met...