Instruct: Classify Amazon reviews into positive or negative sentiment
Query: Bad paper quality

The technical content of this classic book is great, but the paper quality is absolutely horrible. The material (whatever it is) is almost toxic, as it leaves off a dusty residue that makes breathing difficult.If you care about your health, do NOT buy this book. I'm surprised it didn't come with a warning label, as in: "Prolonged reading may cause Respiratory Complications, etc."Finally, the book came in softcover, instead of the advertised hardcover.