AD 264 - The Roman Empire is torn in two. The western provinces - Gaul, Spain and Britain - have been seized by the pretender Postumus. To the east, on the plains of northern Italy, the armies of the emperor Gallienus muster. War is coming. Everyone must choose a side. On a mission shrouded in secrecy and suspicion, Ballista must journey The Amber Road to the far north to Hyperborea, back to his original home and the people of his birth.
A fearsome, masked warlord attacks, bringing fire and sword against the Angles. Yet not all welcome Ballista's return. Does treachery pose the greatest danger? Dr Harry Sidebottom is a leading authority on ancient warfare - he applies his knowledge with a spectacular flair for sheer explosive action and knuckle-whitening drama.