Sixteen-year-old Tris is forced to make a terrible choice. In a divided society where everyone must conform, Tris does not fit.
So she ventures out alone, determined to discover where she truly belongs. Shocked by her brutal new life, Tris can trust no one. And yet she is drawn to a boy who seems to both threaten and protect her.
The hardest choice lies ahead.

Tris has survived a brutal attack, on her former home and family. But she has paid a terrible price. Wracked by grief and guilt, she becomes ever more reckless as she struggles to accept her new future.
Yet if Tris wants to uncover the truth about her world, she must be stronger than ever... because more shocking choices and sacrifices lie ahead.

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 behind. Old discoveries are quickly rendered meaningless. Explosive new truths change the hearts of those she loves. And once again Tris must battle to comprehend the complexities of human nature - and of herself - while facing impossible choices about courage, allegiance, sacrifice and love.