In the Dark of the Night by John Saul
Interesting, weird… good read as expected from this author’s 33rd novel. Being from Wisconsin I figured out much of the mystery before the main characters did. We do, unfortunately, have a grotesque history of serial killers hailing from our state.
Preview of The Devil’s Labyrinth in the back. Sounds like it will be interesting as well.
You can check out the author and his other works at JohnSaul.com