Beyond the fence surrounding the village, in the Forest of Hands and Teeth, live the Unconsecrated. Well, perhaps the word "live" isn't quite accurate. Carrie Ryan's book, The Forest of Hands and Teeth, is about a young girl named Mary and her world of the Guardians, the Sisterhood, and the zombies, the world after the Return. You won't want to read it after dark.
I'm waiting for the next book in the series.