Allegiant

Imagine a city where people are sorted into groups like school teams based on what they're good at, but it's super strict and unfair. Kids Tris and her boyfriend Four find out the whole city is just a big science experiment by grown-ups outside who think some people are 'bad genes' and need to be fixed. They team up with friends to fight the bosses, sneak into secret labs, and try to free everyone, but it gets really sad with big choices and not everyone makes it home—showing bravery means sometimes saying goodbye to save others.

Allegiant, the third installment in Veronica Roth's Divergent trilogy, shifts the narrative to dual perspectives from protagonists Tris Prior and Tobias 'Four' Eaton as they navigate the crumbling faction system of a post-apocalyptic Chicago. After the factionless uprising topples the oppressive government, Tris and Four uncover hidden truths beyond the city's electric fence: their world is an experiment conducted by the Bureau of Genetic Welfare, which classifies citizens as 'genetically pure' (GP) or 'genetically damaged' (GD) based on engineered traits. The Bureau's leader, David, manipulates events to reset the experiment, forcing Tris, Four, and their allies— including loyal friends like Christina and Marcus—to infiltrate the facility and expose the genetic lies perpetuating societal division. As revelations unfold, internal conflicts intensify: Four grapples with his father's legacy and trust issues, while Tris confronts her brother's betrayal in siding with David for ideological purity. The novel culminates in high-stakes action, profound sacrifices, and a reevaluation of human worth beyond genetics, ending on a poignant note of hope amid devastation. Roth masterfully weaves themes of free will against predestination, challenging readers to question inherited flaws versus chosen paths in a world engineered for control.