All her life, Cassia has never had a choice. The Society dictates everything: when and how to play, where to work, where to live, what to eat and wear, when to die, and most importantly to Cassia as she turns 17, whom to marry. When she is Matched with her best friend Xander, things couldn't be more perfect. But why did her neighbor Ky's face show up on her match disk as well?

Beyond the Titan wall lies the Feral Zone, and the only people who break quarantine and venture there are the "fetches", who are paid exorbitant sums to bring back items that were left behind when the wall went up--but Delaney McEvoy's father is there and she is being forced to find him and bring him back.

Ahab Goldstein is a seventh-grader living in an United States (specifically Maine) where the environment has turned toxic, and the corrupt Environmental Police Force is in control, limiting access to natural resources like gas and water, issuing fines, and transporting "fragile" species (pretty much all of them) to the Center for Species Rehabilitation in New Arcadia (a dubious refuge at best); so when Ahab and his friends find a real live bullfrog...