Instruct: Classify Amazon reviews into positive or negative sentiment
Query: Next time, please hire a professional editor

I don't think I've ever had a lower opinion of a book before. It is poorly organized, and can't even manage to be consistent in its material. Terms are used several chapters before they are explained, and sometimes not at all. The same tables are printed in a number of different places in the book, but contain conflicting data. It is painfully obvious that it went to print without a single person bothering to proof read it. Unfortunately, it is the required text for a course I am taking. Sometimes we joke about how bad it is, but mainly we are frustrated.