Use, use, use this book for two purposes: 1) to practice answering questions quickly, & 2) to boost your self-esteem. My actual score was anywhere from 100-200 points lower than I consistently scored on these practice tests, so it may be beneficial to consider this book as an ego-booster.
This book, and several other GRE books, has absorbed the past three months of my life. Glad I will be able to recycle it in a few days. Great read. I recommend it to anyone who has insomnia. If x>0 and y<0, what is greater x/y or y/x? Enjoy!
It's mostly just a bunch of practice tests and answers. It would have been a lot more helpful if there had been more explanation of how to get the right answers.