Dark Kiss (Nightwatchers 1)

I don't do dangerous.  

Smart, über-careful, ordinary Samantha-that's me. But I just couldn't pass up a surprise kiss from my number-one unattainable crush. A kiss that did something to me...something strange. Now I feel hungry all the time, but not for food. It's like part of me is missing-and I don't know if I can get it back. 

Then there's Bishop. At first I thought he was just a street kid, but the secrets he's keeping are as intense as his unearthly blue eyes. If he's what I think he is, he may be the only one who can help me. But something terrifying is closing in, and the one chance Bishop and I have to stop it means losing everything I ever wanted and embracing the darkness inside me.... 

NIGHTWATCHERS 

When angels and demons must work together, something beyond evil is rising...