Book

"I watched his body change. He crouched on the roof, one hand gripping the edge. All that strange friendliness disappeared, and he was a hunter. That was something I recognized, something I was comfortable with because I understood it. I turned off my brain. It was time to hunt. I took a deep breath, drawing in the scent of the blood inside the humans below." (Etc. Couldn't fit the entire blurb)