Bladestorm (Heart of a Vampire, Book 8) - Heart of a Vampire, #8

She's running scared, afraid to open her heart. He won't give up until he proves to her that love can heal. As an empath, Shana Wilder keeps most people at a distance. Last year, when she learned the paranormal actually exists, she lost friends, and nearly her own life. Now, more vampires and other creatures are wreaking havoc on Phoenix's city streets. More of Shana's friends are dying. And the only person she can turn to is a man who makes her yearn for things she long ago decided could never be for her. Sebastian Lucerne never wanted to be a vampire Master, with all the headaches that come with the job.
But when Phoenix needed to band together, to stop evil's spread, he took control. Unfortunately, dark magics are spreading through his city, once again. Nor can he deny that one of his top concerns remains the stubborn, sexy, and far too distant Shana, who refuses to let him further into her heart. Sebastian swears to keep her safe, along with the rest of his city. He'll stamp out the murderous Rogues, and then, will somehow find a way to reach Shana.
Assuming their enemies don't take them down first.