Divergent Series (Divergent, Insurgent, Allegiant): by Veronica Roth -- Sidekick

Tris is reeling from devastating losses and torn between the factions crumbling into war around her, forced to make impossible choices that could save everyone she loves—or destroy them entirely. As conflict erupts and secrets unravel, she discovers that being Divergent is far more dangerous and powerful than she ever imagined, pushing her to embrace abilities she barely understands. With grief weighing on her heart and her relationships fundamentally shifting, Tris must navigate a world where loyalty is currency and every decision carries consequences she can't predict. This is a heart-pounding continuation that deepens the stakes, the romance, and the mystery at the heart of this dystopian world.