I loved it, from beginning to end. This was the first (and only) book I've read of Simon Scarrow.
Roman history had been my favorite history subject growing up, as the aspect of an empire stretching a large part of Europe always fascinated me. Not only were the romans (by all accounts) highly civilized, they also embodied the definition of a modern fighting force, using advanced tactics, rigid discipline and practical equipment to fight their adversaries. All in all, riveting and highly engrossing stuff to read about.
Two things I noticed about this book that let the imagination run loose, was the sense of scale and location; The deserts of Palmyra sound brutal, bleak, unforgiving and truly god(s)forsaken, you even get the sense that some of the characters from the fortress of Palmyra even want out of the barren wasteland, something which I wholly believed because the image the writer described feels so vivid.
Furthermore, you truly get the idea that the Roman legion is completely outnumbered by an enemy that is unique and dangerous, already adding to the feeling of isolation and death the desert projects. With characters sometimes adding in lines that the location they are feels more like a deathtrap than a strategic and tactical position for the empire, it hightens the stakes and enforces the helplesness and bleakness of it all.
The main characters were unmemorable for me, surely in part because they feel and sound like walking clichés: Cato, the struggling hero trying to prove himself among his comrades and Macro, the no-nonsense, gruff and straight talking officer with a something of a chip on his shoulder concerning the command of his men.
The secondary cast however, like the prince of Palmyra, are a little bit more fleshed out. For instance, although the outcast prince has an obvious hidden agenda, I always felt like he had something more to prove towards others and himself, never quite letting on to what he actually wanted.
Characterization can go a long way to make a story better, as the characters within the novels make the more slow passages worth reading and give the world more color. The only thing that holds it back for me, is that the main characters would be fleshed out more.
History and fiction go hand in hand most of the time, and this is one of those examples that make great use of a particular time and setting that is, one of my favorite history subjects of all time.