The main themes of this book are survival and escape. The story is set to the future, where people live off probes, with grey skies, and the Urb divided into latches controlled by different gangs. Eden is the only place where good exists, but only the genetically improved humans live there. The main character, Spaz, risks his life to escape his latch, and goes on a adventure to reach his sister suffering from a major illness. I recommend this book for students who enjoy science fiction. Mia J., Grade 8