Instruct: Classify Amazon reviews into positive or negative sentiment
Query: Beware of this edition!

I can't believe in that book! I'm from Brazil and practice Ba Zhai and Xuen Kong and bought this book because it has the two schools and I though that was a reference. Surprise! The 8 houses was take off the third edition!!! A new edition is to ADD something else, not to take off. The Amazon don't have the new edition "look inside", but the older. I'm very disappointed with this book.