Dark Return (Vampire Seeker, Book 2)

Janie Grey is dedicated to hunting the undead, an inherited duty passed down from her Cherokee ancestors and generations of powerful Seekers before her. Then, there's Kai. He's like no one she's ever cocky, fast, skillful, infuriating and gorgeous. Not only has he become a valuable asset in her fight against the growing population of the vampire/demon hybrid known as Daychildren... she's unwittingly fallen for him. Just when Janie thinks she's learned everything there is to know about Kai's mysterious past, there's a newcomer to Baltimore. Someone who will do anything to make sure Janie loses Kai forever.