Cytonic is the third book in Brandon Sanderson's epic Skyward series. The New York Times Bestseller follows Spensa, a girl who must travel beyond the stars into the Nowhere to discover her true nature and save the world she loves from destruction. This fast-paced, terrifying mission is a nonstop sci-fi adventure, where Spensa, along with her AI-powered drone, faces her fears and puts her life on the line to save the galaxy.