Instruct: Classify a review as either positive or negative.
Query: Great book

I had the class with one of the authors of the book.This version of the book is actually superior to the 3rd edition - it has a lot more in it.If you are taking an auto-controls course, you should talk to the professor and see if you can use the 2nd edition.I mean good Lord, this superior textbook is being sold (used) for $3.50 as of this writing, and the 3rd edition is going for $150+. What a ripoff!