Seize the Night by Sherrilyn Kenyon

I was born the noble son of a legendary Roman senator. I walked through the ancient world as a general, admired and supreme until a bbrutal betrayal caused me to bargain my soul. Now I'm an immortal Dark-Hunter, bound to protect mankind from the evill scourge that hunts it. Over the centuries, I've seen many frightening thing: plagues, pertilence, disco musiics....

And now Tabitha Devereaux. A human, she has trained herself to fight vampires every but as capably as any Dark-Hunter. Idiosyncratic and off-beat, she is my personal bane - and yet she beguiled me. There are only two small problems. She happens to be the twin of my mortal enemy's wife. More than that, Tabitha and her sister are being stalked by a power that will not rest until everyone she olds dear is dead.

Unlike my Dark-Hunter brethen, I rely on no one but myself. They spurned me and I turned my back on them. But the ony way to save Tabitha and her family is to find some way to bridge a two-thousand-year-old feud.

They say opposites attract, but they can stay together when eve the Fates conspire to keep them apart? Then again, the Fates have never dealt with the likes of Tabitha Devereaux before. They're going to be in for quite a fight....

--Valerius Magnus