Martyn Bedford - Flip - Published by Wendy Lamb Books - 5 April 2011
And when he looks in the mirror, another boy's face stares back at him. A boy named Flip. Unless Alex finds out what's happened and how to get back to his own life, he may be trapped forever inside a body that belongs to someone else.
Questions of identity, the will to survive, and what you're willing to sacrifice to be alive make this extraordinary book impossible to put down.
Forced to flee his home and family, twelve-year-old Will Ritter falls in with the Undertakers-a rag-tag army of teenage resistance fighters who've banded together to battle the Corpses.