Showing Strangers by Dean Koontz

A surgeon, a writer, a motel-keeper, a priest and a thief; they have nothing in common - nothing but one hot summer night at the Tranquillity Motel. A night filled with unending terror, a night when an awesome power stripped them of their memories. Now the evil is creeping back into their minds. Slowly, tauntingly, maddeningly they are recalling the unspeakable events of that fateful moonlit evening. And as the vision of evil grows clearer, the guests of the Tranquillity Motel seek each other out. Some of them will not live to face the power head on. But some will - in a terror-packed climax unlike anything ever experienced before...