Back in Black: Black Knight Chronicles, Book 2

In the second volume of The Black Knight Chronicles, vampire detectives Jimmy Black and Greg Knightwood investigate a series of assaults plaguing the alleys of Charlotte. Along the way they battle trolls, bigotry, fairies, dragons, and small minds on the way to a knock-down battle royal inside a steel cage. The boys find themselves fighting evil in alleys, trolls in bars, and dragons in FairyLand and trying to scrub the sparkle off after a battle with vicious fae in the hall of the fairy queen.

Yeah, really. All that and vampires, too.