A Different Kind of Chill

Dennis Etchison's books. This is disturbing stuff. People seem ordinary and they have no supernatural powers - but they are casual monsters. Sometimes the story title clues you in to the tone. For example: Sitting in the Corner, Whimpering Quietly. Psychological terror is introduced slyly, instead of being wielded like a club. He does change it up -  you read a story that scares you right out of your britches, then the next is essentially an extended pun. Gives you a little bit of a break from the intensity. For those who appreciate Joyce Carol Oates' really dark side.
The Dark Country