DNF. Not rating this one because I only made it four hours in, with six to go. I really enjoyed Grady Hendrix' previous book, Horrorstor, but this one just wasn't for me. It is HEAVY on 80's teen girl life and the issues and pressures of going to a preppy private school in 1984. Into this mix, our heroine's best friend FOR LIFE gets possessed by a demon, leading to more and more erratic and weird behavior. Adults think she's on the drugs and school friends drop her like a rock because she's not cool anymore...and that was as far as I got because I was finding the whole thing rather depressing. I wasn't a teen girl in the 80's so endless nostalgia-checking commentary about writing boys' names in Trapper Keepers while arguing about Phil Collins... that stuff just didn't do anything for me. For a female reader of the right age, this is probably going to be like Ready Player One was for old nerds, though! But, not me. Teen girl drama was horrifying enough already without adding possession to the mix. On to the next!