Instruct: Classify the given Amazon review into positive or negative sentiment.
Query: Not a good book

I bought this book along with the companion "An opening repertoire for the attacking player" and I have to say that I was thoroughly disappointed. The lines given are not particularly popular. Not only that, I crossed referenced some of the lines with other books and a database, and the results were depressing: hardly ever did white get and advantage and black's choices were rather limited. There are very few explanations. If you are searching for a complete repertoire, this is not it. You will not understand why you are playing certain moves.