First instalment in Andy McNab's gritty new series, about a youngster who turns his life around from London criminal gang member, to army soldier. But for Sean Harker, it's not that easy to leave the past behind. Now in paperback. Ages: 12 CRIMINAL TURNED SOLDIER - NOW HE MUST STOP A WAR ON LONDON'S STREETS. London gang member Sean Harker is down on his luck. It's hard, gruelling work in the army cadet force, but it's a chance for another life in the army - fulfilling, thrilling and adventurous. But leaving gang life behind is not going to be easy.