Instruct: Classify Amazon reviews into positive or negative sentiment
Query: Don't buy this edition if you have the 3rd edition

Don't buy this edition if you have the 3rd ed., only the cover is changed from the 3rd edition, not even a single word is different (I wasted $6.00 + shipping in buying it). The book is excellent, though it could have used an additional (2nd) or a brand new IQ test in this edition