Cal Leandros Series by Rob Thurman

After saving the world from his fiendish father's side of the family, Cal Leandros and his stalwart half-brother Niko have settled down with new digs and a new gig-bodyguard and detective work. And in New York City, where preternatural beings stalk the streets just like normal folk, business is good. Their latest case has them going undercover for the Kin-the werewolf Mafia. A low-level Kin boss thinks a rival is setting him up for a fall, and wants proof... moreAfter saving the world from his fiendish father's side of the family, Cal Leandros and his stalwart half-brother Niko have settled down with new digs and a new gig-bodyguard and detective work. And in New York City, where preternatural beings stalk the streets just like normal folk, business is good. Their latest case has them going undercover for the Kin-the werewolf Mafia. A low-level Kin boss thinks a rival is setting him up for a fall, and wants proof. The place to start is the back room of Moonshine-a gambling club for non-humans. Cal thinks it's a simple in-and-out job. But Cal is very, very wrong. Cal and Niko are being set up themselves-and the people behind it have a bite much worse than their bark... less

Half-human Cal Leandros and his brother, Niko, aren't exactly prospering with their preternatural detective agency. Who could have guessed that business could dry up in New York City, where vampires, trolls, and other creepy crawlies are all over the place? But now there's a new arrival in the Big Apple. A malevolent evil with ancient powers is picking off humans like sheep, dead-set on making history with an orgy of blood and murder... moreHalf-human Cal Leandros and his brother, Niko, aren't exactly prospering with their preternatural detective agency. Who could have guessed that business could dry up in New York City, where vampires, trolls, and other creepy crawlies are all over the place? But now there's a new arrival in the Big Apple. A malevolent evil with ancient powers is picking off humans like sheep, dead-set on making history with an orgy of blood and murder. And for Cal and Niko, this is one paycheck they're going to have to earn. less

In a nightmarish new york city, life is there for the taking...Half-human Cal Leandros and his brother, Niko, are barely getting by with their preternatural detective agency when the vampire Seamus hires them. He's being followed, and he wants to know by whom. But the Leandros brothers have to do more than they had planned when Seamus turns up dead (or un-undead). — Worse still is the return of Cal's nightmarish family, the Auphe... moreIn a nightmarish new york city, life is there for the taking...Half-human Cal Leandros and his brother, Niko, are barely getting by with their preternatural detective agency when the vampire Seamus hires them. He's being followed, and he wants to know by whom. But the Leandros brothers have to do more than they had planned when Seamus turns up dead (or un-undead). — Worse still is the return of Cal's nightmarish family, the Auphe. The last time Cal and Niko faced them, the Auphe were almost wiped out. Now they want revenge. Cal knows that before the Auphe get to him, they will try to destroy everything and everyone he holds dear. Because for the Auphe, Cal's pain is a pleasure.And they're feeling good. less