The Hunter by Eve Bale

Possessing blood that vampires crave made Corie into a blood slave. The man whose job it was to hunt her fell in love with her instead. Can a betrayed soul and a tormented heart rediscover a future that was stolen from them?
Four years ago, the temptation of coming face-to-face with vampires lured Corie Deane from her quiet life in California to vampire-controlled Las Vegas. If she’d known the decision would cost her freedom, she’d have run when she’d had the chance. She most definitely would not have fallen in love with a vampire she couldn’t trust.
Alexei Ivanov has centuries of blood staining his hands. He hunts, and he kills. Those things are what he does best. Falling in love was never part of his future. Not until fate intervened. A long time ago, he failed Corie. Now that he’s found her again, he’s determined to protect her from those who want to enslave her. Whatever it takes, whatever it costs him, she is his—and he won’t let her go.