Appointment with Death (Poirot) - Agatha Christie

Twice as brilliant as Death on the Nile, which was entirely brilliant Observer

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 hed overheard back in Jerusalem: You see, dont you, that shes got to be killed? Mrs Boynton was, indeed, the most detestable woman hed ever met