A Viking declares a blood feud against Charlemagne. But how do you take vengeance on the ruler of the world?

Four centuries after the fall of Rome, forces are working to put the world back together again-and working against each other.

Ali, a young Moor brought to northern Europe as a boy, is present at a massacre of Saxons and Northmen by Frankish soldiers. He joins the surviving Northmen in their escape and their attempts to get home. But, in a world filled with hostile savages and ruthless political operators, getting home isn't that easy.

And that's not the only...