The first of a new action series for teens from Chris Ryan. When Zak Darke's parents die in an unexplained mass murder he's left alone in the world - until he's sought out by a mysterious man and becomes Agent 21. He doesn't know what happened to the 20 before him, but he does know his life is about to change forever. Ages: 12 That is until he's sought out by a mysterious man: 'I work for a government agency,' the man tells him. What he does know is that his life is about to change for ever .
