The Devil's Playground (Morgan Kingsley Exorcist Series), Paperback Book, By: Jenna Black

No one ever wants to serve in Hell. The Seven Deadlies, a demon club in Philadelphia, has always catered to the most attractive and desirable hosts. Recently, though, more and more of the lower dregs of society have been showing up with demons of their own in alarming numbers. Morgan is sure that Dougal is behind this, but isn't sure why. Is Dougal building an army to snatch the throne of the demons from Lugh? If there's one person who can get to the bottom of this, it's Morgan Kingsley, but caught between her mortal lover Brian and the demon she lusts for, Lugh, it's going to take everything she has to keep her head and heart in the game.