Carey, Anna. Eve trilogy.

Sequel to: Eve. Includes a preview of Rise, the final book of the trilogy

"For the first time since escaping from her School, Eve can finally sleep soundly. She is living in Califia, protected from the terrifying fate that awaits orphaned girls in The New America in the year 2041. But she was forced to abandon Caleb, the boy she loves, wounded and alone at Califia's gates. When Eve gets word that Caleb is in trouble, she sets out into the wild again to rescue him, only to be captured and brought to the City of Sand. Trapped inside the city walls, Eve uncovers a shocking secret about her past--and must confront the harsh reality of her future"--Publisher