T. J. Andrews & Simon Scarrow 
Arena: Challenger (Part Two of the Roman Arena Series) [EPUB ebook] 

The second novella in Simon Scarrow’s Roman Arena series, following novice gladiator Pavo’s next gruelling test, which will put mentor Macro’s loyalties on the line.Rome under the rule of the ruthless new Emperor Claudius is a dangerous place. Condemned to gladiator school Marcus Valerius Pavo, the son of a treasonous general, is a celebrated hero following a dramatic victory in the arena. Now he finds himself pitted against one of the greatest gladiators who ever lived: Decimus Cominius Denter. Though Denter has fallen on harder times he is still a formidable opponent, and it is up to newly decorated Macro to whip him into shape. But as the much-heralded fight descends into chaos and riots threaten to engulf the city, Macro must choose between his duty to Rome and his loyalty to Pavo…