After returning from the Nowhere, Spensa brings back new knowledge about the Delvers and her Cytonic abilities. The Superiority’s campaign for galactic control continues, and Skyward Flight has gathered allies to resist it. Spensa must find a way to use what she learned to help stop the threat while confronting the risks her abilities pose to herself and her friends. Defiant is the fourth and final novel in Brandon Sanderson’s Skyward series. Read Skyward, Starsight, and Cytonic first.