On a cold January evening in 50BC, two strangers enter Rome - one an Egyptian ambassador and the other a eunuch priest. Both are seeking Gordianus the Finder, who has a reputation for solving murders. But the ambassador, a philosopher named Dio, asks for something Gordianus cannot give - help in staying alive.

Sworn Brother continues an utterly compelling journey back in time to a Viking world that is brimming with wonderfully crafted characters and their insatiable hunger for riches and renown.

AD 98: The army base at Vindolanda lies on the northern frontier of Britannia and the entire Roman world. Defences are weak, as tribes rebel against Roman rule, and local druids preach the fiery destruction of the invaders.