The 2017 Official Guide Series is available at and bookstores worldwide. Additional product features of the Official Guide for GMAT Review 2017 series:
The Official Guide for GMAT Review 2017 series — comprising the Official Guide for GMAT Review,the Official Guide for GMAT Quantitative Review, and the Official Guide for GMAT Verbal Review — offers access to more than 1,500 past GMAT questions. The Official Guide for GMAT Review also includes a 100 question diagnostic test to help focus test preparation studies.
DEPTH: The biggest difference between the two books is the depth of the material. In the Princeton Review they give a good introduction to the test and when you are done with the book you feel confident to tackle the GMAT. But when you do the GMAT Review you will find out many concepts were skipped in the Princeton Review, or only the simplest form was discussed. The GMAT Review does not explain all concepts either, but when doing the test questions you will stumble upon them anyways.