While they aren't the focus of the story, I'd recommend reading Pact for a story with some rather nasty fey. A couple of warnings ahead of time: it's a long read at nearly 950,000 words (somewhere between 3000 and 3500 pages), and it's also a bit of a doom spiral. If you're looking for a classic fantasy, this ain't it. The basic premise of the story is that the universe literally despises the protagonist through no fault of their own. It doesn't really ever give the protagonist room to breathe or get his footing.In my experience of many bad paranormal romance novels, fairies are just human but with big slang words. The fair folk that haunt the nightmares of humanity are overshadowed by that, sadly.