The Sixth Faction by Veronica Roth — book slip

Beatrice Prior stands on the brink of a decision every person in her world must make: five factions, five futures, five lives.

She has a plan: she’s going to make the bravest choice and leave Abnegation to join Dauntless, even though it means abandoning her family.

But when tragedy strikes at her choosing ceremony, everything changes—her world, her plans, even Beatrice herself.

Her decision will thrust her into the crosshairs of an underground rebellion, where a boy with secrets as dangerous as her own—a boy with only a number for a name—may be the only person she can trust.

One choice will change everything.