Friend of the devil / Stephen Lloyd.

Enhanced descriptions from Syndetics:

High school can be hell. Literally.


A demonic detective novel best devoured in a single sitting--from acclaimed TV writer Stephen Lloyd.

Welcome to Danforth Putnam, boarding school for the elite, sprawled across its own private island off the coast of New England. Sam, a war vet who feels sure he's seen it all, has been called here to find a stolen rare book. But as he corners D&D nerds, grills steroid-raging linemen, and interviews filthy-rich actresses, he soon senses that something far stranger-"witchy", in fact-is afoot. When students start to meet mysterious and gruesome deaths, Sam realizes just how fast the clock is ticking.

After joining forces with plucky, epilepsy-defying school reporter Harriet, Sam ventures into increasingly dark territory, unravelling a supernatural mystery that will upend everything he thinks he knows about this school-and then shatter his own reality.

Toss Dracula into a blender, throw in a shot of hard-boiled detective fiction, splash in a couple drops of Stranger Things, and pour yourself a nice tall glass of Friend of the Devil.