As the title suggests, this book contains all of the concept art from ACO. In short, it's freaking gorgeous and brings up a lot of neat details that would otherwise go unnoticed. If your a fan of the game, the ancient Greek world, or of art in general then I highly recommend this to you. As a ‘book’ it is excellent quality, with semi-gloss paper and nice hefty hard covers. It's also a steal on Mighty Ape (it's been more expensive almost everywhere else I've looked). Buy this book, or may Hermes drop you into the Styx