The obvious reference point here is John M. Ford’s “The Dragon Waiting”, another alternate-history novel with lots of magic and style to make up for occasional weaknesses of plot and character. However, Davidson’s choice of setting, the ancient world as described by writers of medieval romances (who made it resemble the medieval world to a considerable extent), is somewhat more recherche than Ford’s, and that’s more or less the problem with the book: Davidson gambles that he can get by almost entirely on setting and style, plot and character be damned, and loses badly. Davidson has clearly done a ton of research in order to put together a version of the ancient Roman world in which Vergil (I’m following Davidson’s spelling here, though the author of the Aeneid is usually given as Virgil with two i’s) is a mage living in Naples, and he is more than happy to show off what he’s learned. (For instance, there’s a scene in which Vergil is at a hunt and Davidson introduces a discussion of medieval hunting that screams “look at all the books I’ve read!”: T.H. White did it much better, and far more subtly, in “The Sword in the Stone”.) Unfortunately, he has not spent the same amount of time putting together a reasonable plot. Take the titular mirror: it has to be made out of brass that Vergil forges himself, so he needs to get some copper and some tin. Copper requires a difficult trip to Cyprus, full of adventure and danger, and tin comes from Britain, even further away, so one expects even more adventures as Vergil obtains some of it, but instead some tin just shows up one day: it’s a bit jarring, really. Then, once the mirror is constructed, accomplishing a goal that Vergil has spent the entire first two-thirds of the book striving towards, it is used once, giving an unclear result, and then never referred to again. These kinds of ridiculous plot shenanigans might be forgivable if we cared about the characters, but, frankly, we don’t. Vergil never makes much of an impression, his buddy Clemens is nothing more than (in theory, if, alas, not always in practice) a certain amount of comic relief, Cordelia is not especially interesting as a villain, the Ruddy Man manages to be enigmatic and mysterious without being especially intriguing, the love interest would probably be more interesting if she were a cardboard cutout, and that’s really about it. There’s one more commonality between Davidson and Ford: they are both writers’ writers, whose biggest fans seem to be other writers. When it comes to Davidson, at least, I just can’t figure out why this is the case.