Knell by Olivia R. Burton

It starts with a trail of bodies, and things get so much worse. The Prince of Hell’s come asking Veruca to help him track down and protect a banshee from the queen of all Fairy. She’s the best suited for the task, both because she’s a badass Reaper with friends in low places, and because of her deep connection to a certain special necromancer. Knowing Belial wouldn’t give her an impossible task, she agrees.

One by one, things go sideways, putting those she loves in peril, stripping away her support structures, and leaving her out in the cold.Cruelly separated from Belial by powerful Fairies, the danger of the hunt, and a newfound knowledge that threatens her very sanity, Veruca must rely on only her wits and her friends to survive. In the end, it all comes down to hard choices she never thought she’d have to make—and asking herself if loving Finn is really worth the world itself.