Simon Scarrow is a teacher at a Sixth Form College. He has run a Roman History programme that takes parties of students to a number of sites and museums across Britain and I assume that while doing this he gleans lots of useful information for his books on the Roman Centurions Macro and Cato.
This is the eighth book in a series started seven years ago and Cato the young boy who left the confines of the Palace in Rome and entered the army as an Optio (second in command to a Centurion) has now matured into a man, moulded in the image of his friend and mentor Macro. Both men are battle hardened Centurions, though Macro has a dozen years on Cato. They have fought together in Britain and many other parts of the Roman Empire.
Macro and Cato are shipped to yet another part of the Empire by the Roman senate and become embroiled in a fight to stabilise what is to all intents and purposes a neutral kingdom, Palmyra. As usual wherever the pair go trouble follows close behind and it is not long before the pair of them are engaged in trying to stop the forces of one of Rome's long standing enemies, Parthia, who having heard of Rome's presence in Palmyra decide it will be in their own best interest if they also send a force into the kingdom.
Macro and Cato are old friends to the readers of Simon Scarrow's books and their adventures are interesting and exciting, particularly for those interested in all things Roman and in particular the workings and make-up of the Roman Legions. These books are a good form of escapism from the every day drudgery.