You Are Mine by Jenika Snow

Luca
I’d lost my mind, was more animal than man. More crazed than sane.
And all because I hadn’t found my mate, that one female born to be mine and mine alone.
As an over four-hundred-year-old Lycan, a supernatural being who was able to shift from human to my inner wolf, my kind was known as fearsome beasts with unimaginable power. All feared us, and rightfully so.
I had given up hope of ever finding my mate and because of that had let my inner beast reign supreme, control me. I was far more rabid than anything else.
But then it happened. I saw her, my halfling mate. Part Lycan. Part vampire. She was perfect and made just for me.
I craved her like no other, and I’d have her as mine no matter what.
For there was nothing more dangerous than a male of the Otherworld finding his mate and keeping her close.
But she had protectors, brothers and a father who saw me for the beast I was, and were ready to go to war with me… to keep her from me.
I’d been waiting my entire life for her, and they’d soon realize I’d level anything and anyone who thought to stand in the way of claiming my prize, no matter the consequences or repercussions.