Under Starlight — Kassandra Lea

In a forgotten part of the city, where unusual beings are free to be themselves, werewolf police officer Warden searches for his boyfriend, Tate. With help from Snap, an odd little fellow and Tate's assistant, Warden descends into the trolls' den to find Tate. Knowing Tate is a feared inhabitant -- if not unofficial ruler -- of the Underground, Warden can only imagine the way things will play out if he isn't found.

Tate knows all about magic, and he knows trolls don't generally possess it. Upon discovering a doorway, he's captured and held prisoner. Now his only hope is Warden, who wears the key to Tate's freedom. But freedom comes with a price, and Tate makes a tough decision to ensure the trolls never cause problems again.