Recipe for a Ben Kane book: add in lots of violence, hot women (who will be subject to big dollups of mysogyny/prostitution), a druid/seer and a barbarian warrior. Mix together and throw in to a turbulent period in Rome's history. Crowbar into the narrative tedious descriptions of ancient weapons and armour and how they were used, as well as lots of swearing, et voila! Your very own Ben Kane book.
Forget The Forgotten Legion or Spartacus you too are now a 'historical' author.
As other reviewers mention, there are many better options out there.