Instruct: Classify a given review as either positive or negative.
Query: Great book, but with limited appeal.

As the review below states this book isn't a behind-the-scenes book or a chronicle of the development of the game nor is it a book discussing the technological merits of Half Life 2 or the Source Engine. Although, it does contain elements of all of the afformentioned parts, it is in the end an art book, but a great one at that with great color, a sturdy build, and a clean uncluttered design.As a fan of the game myself, I enjoyed seeing all the places and ideas that never made it into the game and the evolution and design of those that did. One area, I feel the book ought to and should have delved into more, was the development and evolution of the plot itself which except in reference to other points was never brought up significantly.Fans of the Half Life franchise and people interested in the creative development of games will find this book of interest. Others may want to pass on it.