Angel

In the seventh book in the bestselling series, evil scientists are still trying to convince Max that she needs to save the world, this time by providing the genetic link in speeding up the pace of evolution. Worse, they're trying to convince her that her perfect mate is Dylan, the newest addition to the flock. The problem is that, despite herself, Max is starting to believe it.
Fang travels the country collecting his own gang of evolved humans, but the two separate flocks must unite to defeat a frightening doomsday cult whose motto is Save the Planet: Kill the Humans. And this time, the true heroine, for once, might just be little Angel.
"I KNOW HE’LL come for me. He has to come for me. Fang wouldn’t let me die here. I’d been in the cage for days. I couldn’t remember eating. I couldn’t remember sleeping. I was disoriented from all the tests and the needles and the acrid disinfectant smell that had permeated my entire childhood... growing up in a lab, as an experiment. And here I was again, disoriented but still capable of a blinding rage. Fang hadn’t come for me. I would have to save myself this time. “You! Get back!” The lab assistant’s wooden billy club smashed against the door of the Great Dane–sized dog crate I was being held in every time I peered out through the front. With each strike, the door’s hinges sustained more damage. Right according to plan."