ESCAPE by Inna Hardison
Book One of the Alliance Series.
What if everything you knew about the world around you was a lie, and the very people you were taught to fear were your salvation, your escape?
Meet Amelia, raised in the safety of a Replenisher compound, a protectorate for the few Alliance females who can bear children. In two months, she will have to choose a mate and begin her duties, except it doesn't happen like that.
When she witnesses a Zoriner boy fall over the wall of the compound, the very wall designed to keep those like her safe from those like him, the injured boy becomes her burden and maybe, if she lets him, her escape from the life she is meant to have, and the key to unraveling of the many secrets and lies on both sides of this conflict and each other. This is the very beginning of her journey.