Ooooh it wasn’t that one, but I just looked it up and that one sounds good!! The one I read was by Alexandra Bell. It’s very like a YA book (not that there’s anything wrong with that, I just wasn’t expecting it) only with some particularly dark references which would have made it unsuitable for YA. Not a huge spoiler, but if you want to know what the unsuitable theme was:
I hope I will too, I like it so far but I’m only one chapter in! 😄