Brothers in Blood is the thirteenth novel in the Eagles of the Empire series by Simon Scarrow.

A messenger on the streets of Rome has been intercepted and tortured, revealing a plot to sabotage the Roman army's campaign against Caratacus, commander of Britannia's native tribes.

A treacherous agent's mission is to open a second front of attack against them and eliminate the two Roman soldiers who could stand in the way.

Unwarned, Cato and Macro are with the Roman army pursuing Caratacus and his men through the mountains of Britannia.

This article about a historical novel of the 2010s set in ancient Rome is a stub.