Vampires.They hunt in every major city, hidden by the crowds, shielded by disbelief. They are Killers, and their prey is human.Not "all" vampires are Killers. The Guardians of the Night sacrifice the superior physical and psychic strength that comes with feeding on humans to protect them. But the Guardians walk a thin line, for even a single kill could leave them helplessly addicted to murder.When detective-turned-P.I. Carolyn Mathers was left at...