Human. Coven, #13

Beware the enemy who hides in plain sight. Samantha and Kathy head to Shady Acres, owned by the Fisher family, for a weekend getaway in the mountains. As soon as they get there, both of them have an uneasy feeling about their hosts. But their cabin is located deep in the woods, far away from the Fisher house, so they decide to make the best of their weekend. And they do have a good time.until the Fishers chase them out of their cabin and into the woods in the middle of the night.
It doesn't take long before the sisters realize they're being hunted like animals for sport. They quickly discover that they're not the first ones this has happened to. And the worst part? The Fishers are completely human. Human is the thirteenth book in the Coven series, which is part of the Art of Magic universe, containing the Lost By Magic and the Under the Moon series.