Violet, a poor girl from the outer city, finds forbidden romance and uncovers brutal secrets when, after three years of training, she is purchased by a royal family as a surrogate mother for royal children.

One choice can transform you -- or it can destroy you. But every choice has consequences, and as unrest surges in the factions all around her, Tris Prior must continue trying to save those she loves -- and herself -- while grappling with haunting questions of grief and forgiveness, identity and loyalty, politics and love. Tris's initiation day should have been marked by celebration and victory with her chosen faction ; instead, the day ended with...