Scarrow Simon. The Legion

The Legion is a 2010 novel by Simon Scarrow, the tenth book in the Eagle series, where we see the return of Macro and Cato, this time trouble is brewing in Egypt. At the start Macro and Cato are continuing their search for the rebel leader Ajax who has now retreated to Egypt. Meanwhile trouble brews between a bordering nation and the two officers must choose between revenge or saving the province.
When the actions of a rebel gladiator in Egypt threaten the stability of the Roman Empire, Prefect Cato and Centurion Macro know he must be stopped. The locals are holding the Romans responsible for the attacks Ajax and his crew have been making along the coast and now Egypt is dangerously volatile. Tasked with tracking and defeating the renegade, Cato and Macro are soon hot on Ajax's trail, determined to destroy the enemy. But will the strength of a psychotically fatalist gladiator and his new-found allies, hell-bent on destruction, defeat the Roman warriors?