I saw this reissue at B & N on my last visit before the pandemic and decided to roll with it. I'm a big fan of the author. I have the Wool trilogy in my top-twenty and also enjoyed Sand, Beacon 23, and his collection of short fiction Machine Learning. I was familiar with the plot based on the summary on the back cover but did not realize that this was a full fledged YA novel. Some good sci-fi in here, but I‘m not a fan of YA.