Kiss of the Night by Sherrilyn Kenyon

What do you get when you have one immortal Viking warrior no one can remember five minutes after he leaves their presence, a princess on the run for her life, and one seriously annoyed demigod? Basically, you get my life.

It started out simple enough. One night I went to save a woman in trouble. The next thing I knew, the doorway to hell had opened and out stepped Daimons--vampires the likes of which I'd never seen before. Led by the son of Apollo, they are out to end the curse that has banished them all to darkness. The only problem with that is they have to kill Cassandra Peters to do it and if she dies, so dies the sun, the earth and all who dwell here. Life's just a bowl full of cherries, ain't it?

Brought together by fate, it's now my job to protect a daughter of the very race I have been hunting for centuries. Neither of us dares to trust the other. But she is the only one who remembers me... More than that, with her courage and strength, she is the only one who has ever touched a heart that I thought had died centuries ago.

The only way for a Dark-Hunter to regain his soul is through the love of a woman. But what happens when that woman isn't exactly human?

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