As with other reviews here, I purchased this book as a coffee table book, and as inspiration for my own game art. In that respect, this book is great. It contains character and object designs, sketches, screenshots etc, but mostly renders of gorgeous game worlds and settings from a great many games.
Further to this, although lacking in technical information (try 'Japanese game graphics' for a more technical book), the artists and level developers have provided some great information on *why* the specific art direction was chosen, and the ideas and philosophy behind the art, and various associated elements such as mood, lighting and camera.