The Nightmare People 2nd edition

Ed Smith thought he was having a waking nightmare when he saw a monstrous face at his window, but in the morning his neighbors were missing. The people who later turned up were not quite right, and gradually Smith realized they not only weren't his neighbors, but weren't even human. They were the creatures he had seen . . . In THE NIGHTMARE PEOPLE, Lawrence Watt-Evans has created a terrifying new monster in the classic tradition of Frankenstein and Dracula.