Instruct: Classify Amazon reviews into positive or negative sentiment
Query: Old Edition

This textbook is the 3rd edition, not the 4th (and latest) edition. My college course requires answers to questions that aren't in this edition of the textbook. Thankfully, I discovered this before a week had passed, so Amazon was happy to refund my purchase and removed the book from my Kindle. However, I'm still left with having to purchase the actual textbook. If you can get by with the 3rd edition of this textbook, fine... But this is not the latest edition, so proceed with caution.