Designed for the NEW GRE MST test coming on August 1, 2011, GRE Prep Book provides you with the most important GRE words you should memorize. We use mathematical algorithms to analyze a database of real GRE problems and determine the most important words students should focus on. As a result, our students average 92% in the vocab section. If you have any question, please contact us at contact@greprepbook.org