School Library JournalGr 9 Up—In this second book in the saga, set in a postapocalyptic U.S. in 2076, Kira is struggling to accept the fact that she is a genetically enhanced human known as a Partial. She makes her way on foot from East Meadow, New York, to the company headquarters of ParaGen in Manhattan in search of a way to cure the RM virus that kills newborns and to stop the expiration of Partials at age 20. Kira allies herself with the last human in Manhattan, Afa, a mentally unstable IT Director from ParaGen who may be able to help her, along with Samm and Heron, the Partials who betrayed, then saved her, and know what she really is. She has to find a cure before the Partials and humans destroy one another. Only by being united will everyone be able to live in peace.