"GMAT 800" offers high-achieving students the toughest practice questions, hardest concepts, and strongest strategies to help them prepare for the GMAT. The guide includes: New! Online companion with intensive math concepts review and practice drills! It also includes hundreds of the toughest practice questions with strategic explanations; tips for getting the questions right on test day; focused guidelines for tackling each question type; proven strategies for getting a perfect score; and special step-by-step methods for special question types.

2008-04-07 Kaplan GMAT 800

I think this is a great book to practice for the GMAT, especially for those who think they can get over 700-730. It has some quite difficult questions and some quite detailed answers. I was especially dreading the sentence correction section of the GMAT and found the study section in this book invaluable.

Even though the book looks quite thick -beware that there are lengthy explanations -so there are quite so many questions in here. However, it is good in that it stops you from getting complacent as there will definitely be some questions here that you will get wrong.