This is a stronger UF than I would have guessed from my other impressions. It's very much a police procedural with demon summoning thrown in the mix. I was actually rather surprised that it felt a little bit like a burgeoning romance, too, but there it is! Demon lovers, unite! :) 
 I was getting the whole Kim Harrison vibe here for a while but I was pleased to see that this is very much its own beast.... or demon. An uber-powerful demon slumming it, a serial murderer, and a mystery. Pretty simple, but I don't mind. I had fun! It's an easy popcorn read and I'm curious to see just where the blood will go. :)