Defiant

Defiant is the third book in Brandon Sanderson's Skyward series, following Spensa as she grapples with the aftermath of her journey into the mysterious "Nowhere," where she encountered the Delvers and uncovered crucial answers about her Cytonic abilities. Having made it back, she faces the looming threat of the Superiority's continued pursuit of galactic control, and the battle for humanity's survival intensifies. Spensa's team, Skyward Flight, has managed to hold off the enemy and gain some allies, but they remain in a precarious position.

To defeat the Superiority once and for all, Spensa must harness the knowledge she gained from the Nowhere—but her powers as a Cytonic come with complexities she hadn't anticipated. As the war escalates, Spensa must confront the high stakes of her powers and the personal cost of victory. She faces the ultimate question: how much is she willing to sacrifice, including her sense of self and the lives of those she cares about, in order to win?