Love, C: Siren's Snare

Marilee hasn't been the same since vampires invaded her town and killed her grandparents.
The once-innocent country girl, now armed with guns and blades, has left the country life behind to kill as many fanged monsters as she can find.
Along the way, she meets Khiderian, a vampire she must work with in order to rescue the man who taught her everything she knows about slaying.
Khiderian has watched over Marilee for years, recognizing her power to raise demons from hell.
A power he must make sure she doesn't use ... or he'll have to kill her.