Death in a White Tie - Ngaio Marsh - Bog

Ah, the London Debutante Season: Giggles and tea-dances, white dresses and inappropriate romances. And much too much champagne. And, apparently, a blackmailer, which is where Inspector Roderick Alleyn comes in. The social whirl is decidedly not Alleyn's environment, so he brings in an assistant in the form of Lord "Bunchy" Gospell, everybody's favorite uncle. Bunchy is more than loveable; he's also got some serious sleuthing skills. But before he can unmask the blackmailer, a murder is announced. And everyone suddenly stops giggling.