The Borderlands series
Book I: Shadow of the Eagle
Faustus Valerianus is the son of a Roman father and a British mother, a captive sold among the spoils after Claudius's invasion. Now both parents have died within a month of each other, and so he sells the family farm and enlists, joining legendary general Agricola's campaign to conquer the entirety of the British Isles culminating in a devastating battle amongst Caledonia's dark mountains.
But Faustus will have to contend with more than ferocious British warriors and whip-cracking elements. For the bonds of blood can weigh heavy on one's soul. The call of his mother's true people. His father's restless shadow. Faustus must carry them with him…