Fight (Book Three, The Hunted‪)‬

Reid is tired of running, tired of hiding. It's time to take the fight to the enemy. No more picking the kids off one by one, wearing them down with terror and starvation. He is ready to act and so are his friends. But something is changing inside Reid, an effect of the strange dust the hunters dissolve into when they die, and he worries he is turning into one of the very creatures he despises.