Volatile Bonds (Prospero's War, #4)

Magic is a drug. Dirty Deals Lead to Deadly Ends. When the Magic Enforcement Agency is called out to the scene of a dirty magic lab explosion, a body with a bullet wound is found in the smoldering ruins. As Detective Kate Prospero and her partner, Special Agent Drew Morales, hunt down the killer, they uncover evidence that a dangerous new coven may be operating in the Cauldron. It's not long before the bodies start piling up, and the heat is on for the team to make an arrest. Solving the murders will require unraveling dangerous alliances between the city's dirty magic covens. And if they're not careful, the new complexities of Morales and Prospero's own partnership threaten to make a volatile situation downright deadly.