Arrow Pointing Nowhere

From Agatha Christie’s favorite American author—creepy correspondence from a Manhattan mansion puts an amateur sleuth on the trail of a killer. Take one grand house, stuff it with staff, and make it home to several generations. If they send their sons to Oxford and occasionally knock each other off, you’ve got a country-house murder mystery, the delight of classic English crime fiction. But if the boys are at Yale, odds are that you’re reading its American counterpart, the New York mansion myste