I could feel the vampire inside me, something separate inside me, like we hadn’t quite fused together. My three-day genetic change was supposed to turn me—fully and completely—into a vampire, fangs and silvering eyes and all. I didn’t understand it, how I could be vampire—the craving for blood, the nocturnal schedule, the fangs and heightened senses—and still feel the separateness of the vampire, a ghost in my machine.