Thanks for the recomendations Corax, I'll definately look into those.
The novels I've been reading are a series of books called the Forgotten Legion chronicles by Ben Kane. It's set in the late Republic around the time of Caesar, Pompey, Crassus etc. Mithras doesn't appear till the second book but then the religion plays quite prominent role in the storyline.
http://www.amazon.co...gion+chronicles
I did a review for UNRV on the first book in the series a while ago.
...we are going to do reviews of both follow up books (Silver Legion and Road to Rome) in the near future...
I look forward to reading them - by the way, I tried to find the review of the first book but could not find it ..probably looking in the wrong place....
Corax