Beatrice Prior's society is divided into five factions--Candor (the honest), Abnegation (the selfless), Dauntless (the brave), Amity (the peaceful), and Erudite (the intelligent). Beatrice must choose between staying with her Abnegation family and transferring factions. Her choice will shock her community and herself. But the newly christened Tris also has a secret, one she's determined to keep hidden, because in this world, what makes you different...

"The faction-based society that Tris Prior once believed in is shattered--fractured by violence and power struggles and scarred by loss and betrayal. So when offered a chance to explore the world past the limits she's known, Tris is ready. Perhaps beyond the fence, she and Tobias will find a simple new life together, free from complicated lies, tangled loyalties, and painful memories. But Tris's new reality is even more alarming than the one she left...