The Traitors — Tom Becker

Adam Wilson is kidnapped and taken to the Dial after betraying his best friend. The Dial is a twilight world where teenage traitors are forced to atone for their treachery. It's a terrible place, ruled over by a cruel despot, where every day is a struggle for survival - and escape. Legend has it that only one person has fled the Colditz-like prison. Nobody knows if he made it back to the real world, but he left behind a ray of hope that has reached through the years. Soon Adam is caught up in a deadly plan to escape. But who can he trust in a world full of traitors...?