Three Act Tragedy
Agatha Christie

Hercule Poirot, his amateur detective acquaintance Mr. Satterthwaite, and the distinguished Harley Street nerve specialist Sir Bartholomew Strange are among the guests at a weekend party being given by the celebrated actor Sir Charles Cartwright at his clifftop house in Cornwall. On the first evening after their arrival there is a cocktail party-at which an elderly clergyman, who's only had a sip of dry martini, falls dead. Was it due to natural causes-or murder?