The Mysterious Affairs at Styles (Hercule Poirot) - Agatha Christie

A country house. A murder. A Belgian detective 

After the Great War, life can never be the same again. Captain Arthur Hastings is invited to Styles To recuperate from injuries sustained at the Front. It is the last place he expects to encounter murder.

Fortunately he knows a former detective, a Belgian refugee, who happens to be staying nearby . . .

Here, for the first time, meet Agatha Christie's legendary creation: Hercule Poirot