Lucas by Jennifer loiske
Part Two of Immortal Blood Series.
It can either destroy you or save you.
He was a ruthless killer who’d killed so many people he had forgotten their faces. She was still a newbie and knew squat about killing, but she was prepared to protect the ones she loved no matter what the cost. When his hands encircled her neck and his fangs pierced her soft flesh, he almost forgot his task. She didn’t. She knew what she had to do to stop him. Even if she had to pay for it with her life.