The Longer Bodies: a Mrs. Bradley Mystery (Rue Morgue Vintage Mysteries)

Great Aunt Puddequet was reputed to be enormously wealthy. It was also a tradition in the family that she was extraordinarily mean. So when the malicious old bird summons her grand-nephews to perform in a games tournament in order to secure their inheritances, they gloomily oblige. Before long, the games are interrupted by murder, the police are baffled, and an unusual psychiatrist called Mrs Bradley begins to take an interest.