Drinker of Blood — Jordan L. Hawk

An outbreak of demon attacks across Charleston has worn SPECTR agent John Starkweather to the bone. Now a new threat faces his team: a demon with bullet -- and bite -- proof skin, which can't be stopped by ordinary means.

John's only solace comes in the form of his lovers: Caleb Jansen and the vampire spirit Gray. Caleb and Gray have their own problems, however. Unbeknownst to John, they've been tracking a mysterious entity across the city. And after they finally come face to face with their quarry, nothing will ever be the same.