Hare Moon — Carrie Ryan

Tabitha can't shake the feeling that something exists beyond the fences of her village. And when she sneaks out, past the gates and down the path into the Forest of Hands and Teeth, she meets a boy who teaches her heart things she never knew. But love in a world surrounded by so much death doesn't come without its sacrifices, and Tabitha gradually realizes just how much she'll have to give up to live among the Unconsecrated.
 
From New York Times bestselling author Carrie Ryan comes an original story of love after the Return.