The Market Basing Mystery: A Hercule Poirot Short Story

A classic Agatha Christie short story, available individually for the first time as an ebook.Holidaying in the countryside and enjoying a quiet breakfast Hastings, Inspector Japp and Poirot are disturbed by a local police officer who needs their help to solve a case. A man has been found shot through the head in a locked room with suicide well and truly ruled out how did he die?