War is inevitable. Survival is not.
Sixteen-year-old Jo isn't just Divergent-he's something more. Stronger. Smarter. A *Deviant*. When the government enforces the GPIT, a brutal test designed to determine who is fit to survive in war, Jo's extraordinary abilities make him stand out. But in a world where power is feared, standing out is dangerous.
Four, now a hardened trainer, prepares those who pass the GPIT for the battlefield. As tensions rise and an all-out war looms, Jo must navigate a deadly game of loyalty, deception, and survival. Because in a war where only the strongest endure, being *Deviant* might be Jo's greatest weapon-or his downfall.
The final battle is here. And this time, no one is safe.