Spensa’s journey as a Defiant Defense Force pilot takes her beyond Detritus and into the wider galaxy. As the Superiority’s war threatens human worlds, she learns that the Delvers—powerful beings capable of destroying entire planetary systems—may be impossible to fight by conventional means. To understand her connection to them and find a way to stop them, Spensa must enter the Nowhere, a place few people return from. Cytonic is the third book in Brandon Sanderson’s Skyward series. Read Skyward and Starsight first.