It’s a suspense novel, focused on a perfect little town. Perfect, and therefore very much ‘off’. Nothing supernatural going on, just humans. Perfectly natural, nasty humans. With very fragile facades. The protagonist, while she comes from a family that originally was part of the town, is an outsider and not exactly welcome. She’ll end up trying to survive long enough to get the hell out again.
It might involve a cult, I’m still deciding on that story line.