The Darkening — Robin T. Popp

Created at the dawn of time to protect humanity, the ancient warriors have been nearly forgotten, though magic lives on--in vampires, werewolves, the Celtic Sidhe, and other beings. But now one of their own has turned rogue, and the world is again in desperate need of the IMMORTALS.

A werewolf and bounty hunter, Lexi was badass to the bone. She had no problem protecting herself in the seedy underground vampire clubs of New York City. Until the Immortal she had tried to summon actually appeared. It wasn't the intricate tattoos around his well-defined muscles that intimidated her; it was the raw power she saw shimmering in his golden brown eyes, power mingled with lust. Though she longed to give in to the passion and pleasure he promised, they first had a curse to break, a brother to find, and a whole legion of vampires to prevent from joining ...THE DARKENING.