Instruct: Classify Amazon reviews into positive or negative sentiment
Query: DON'T BUY THIS BOOK

I agree with everyone else who said not to buy this book. It offers no suggestions on the test and is just a bunch of questions. It is absolutely worthless. The only reason i bought it was because it was the only one available at the time. Download the free practice test and outline from the GRE website and you will certainly do better than if you wasted your money on this.