Whose Body? - Dorothy L. Sayers
The first of the Lord Peter Wimsey books, this is one of my favourites. It perfectly captures the postwar world--superficiality and despair perfectly balanced. Wimsey, in his introduction, is a likeable character, outwardly a prattling fool, but inwardly a shell-shocked, pain-wracked soul torturing himself over his experiences in the war. The mystery is a trifle obvious, but the characters are likeable and fun. More importantly, the book really captures the atmosphere and troubling questions that were faced in the society of postwar England.