On Hadrian's Secret Service

Enrolled into the Commisary (a sort of spy network), he is soon privy to a plot to assassinate the emperor.
Finding himself outlawed for this knowledge, and wanted dead or alive (preferably dead), can he ensure the safety of the emperor?
Not a bad book, has interesting characters and moves along at a good pace.
Offers another theory of what may have happened to Legio IX Hispania (their mysterious disappearance in real life makes them a favourite for novellists).
As far as Roman historical fiction goes, this is a good start to a possible series. Although it will most likely be compared against Simon Scarrow's Falco & Cato books that would be a bit unfair. This is a good novel of the genre in its own right.