Incarceron

Incarceron  - Catherine Fisher The world-building in this exciting dystopian novel is pretty amazing. The reader follows the story of Finn, a prisoner in Incarceron who doesn't seem to be like the other prisoners and Claudia, the wealthy, pampered, educated daughter of the Warden of Incarceron. The world is pieced together for the reader through the alternating narratives.
You can read the rest of my review here: http://abookgeek-llm.blogspot.com/2010/08/incarceron.html