All Divergent books by Veronica Roth — the complete trilogy plus Four: A Divergent Collection.
Set in a future Chicago divided into five factions based on human virtue. Tris Prior discovers she is Divergent — she doesn't belong to one faction — which makes her dangerous to the ruling order. The series is a propulsive YA dystopia with genuine thriller momentum.
Start with Divergent (2011) — the first book and the best entry point.
Sixteen-year-old Beatrice Prior must choose which faction she will devote her life to. Her choice shocks everyone, including herself — and reveals a secret that could unravel her society.
Tris must face the consequences of her choices and confront a war between the factions while searching for the truth about who the Divergent really are and why they are targeted.
The faction system has been shattered. Tris and Four venture beyond the wall surrounding Chicago to discover the truth behind their entire civilization. The conclusion that divided readers — and earned respect for its courage.
Four novellas told from Tobias Eaton's perspective, covering events from before and during the trilogy. Best read after the main series.
Read in publication order: Divergent, Insurgent, Allegiant, then Four. The trilogy must be read in sequence — each book ends on a cliffhanger leading directly into the next.
No — it's a companion volume for fans who want more, not a required part of the story. If you loved the trilogy, it's worth reading. If you're not already invested in Tobias as a character, it's skippable.
Yes. The ending upset many readers on first release, but the book is well-crafted and Roth made a brave choice that most YA authors wouldn't attempt. Give it a fair read — the conclusion earns more respect with time.
Both are dystopian YA with a female protagonist fighting a corrupt system. The Hunger Games is more politically nuanced and has a stronger first book. Divergent has stronger romantic tension and a more personal focus on identity. If you loved one, you'll likely enjoy the other.