Arrows of Fury

Arrows of Fury - Anthony Riches Slower to get going compared to the first book [b:Wounds of Honour|6911710|Wounds of Honour (Empire, #1)|Anthony Riches||7137262], and otherwise it's more of the same.

Centurion Marcus Aquila has to keep his head down as another Roman comes over to Britain trying to track him down after his family are branded traitors by the emperor.
His higher-up friends who know his secret manage to keep him out of the way by sending him and his century off scouting around the countryside, where (as in book 1) he runs into all sorts of barbarians and kills them.

The second half gets more into the action and has some tense moments.