This is one of the most extraordinary history/archaeology books I've ever encountered. It is packed full of historical details, maps, and reconstructions of Roman buildings, almost all of which are now (in Britain) nothing but foundations. Further, the text is written in an intelligent but light-hearted style, making it highly accessible to non-specialists. The only, very minor, negative is that a couple of the drawings/paintings of the derelict Roman remains seem to show "gravity defying" stones, and don't seem to correspond to all the known facts. Nonetheless, that's absolute nitpicking, in what is a magnificent achievement of a book.