Instruct: Classify Amazon reviews into positive or negative sentiment
Query: Book of confusion

This book could have achieve much more than it did, had the writer spent mroe time really checking the facts. I had the impression the book was rushed to meet some dead-line, I don't know. Anyway, it's the best thing ever produced about Black Sabbath and it's worthwhile read for die-hard fans, only. It does not reach the quality of HAMMER OF THE GODS or RUN TO THE HILLS.