### Bookshelf

Total GMAT MathJeff's complete Quant guide, on sale now! |

Total GMAT VerbalEverything you need to ace GMAT Verbal! |

**1,800 Practice Math Questions**

Buy Jeff's books at Amazon.com

GMAT Official Guide, with IR

OG Math | OG Verbal

OG12 & Quant Rev solutions!

**GMAT Question of the Day**

Beginner's Guide to the GMAT

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## Guide to OG: 12th Edition Update

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I'm happy to announce that I've updated my Guide to the Official Guide to reflect the content of the 12th edition of the GMAC Official Guide to the GMAT!

There are over 100 new practice math problems in the 12th edition that did not appear in the 11th edition, including a large number of new Data Sufficiency problems. My Guide to the OG now includes explanations for every question in the 12th edition, both the new problems and the recycled problems from previous editions.

You can read all about my Guide to the OG by clicking here. You can read my review of the 12th edition itself here.

If you don't already have my Guide to the Official Guide, this is a great time to purchase. Get a no-nonsense explanation of all 452 quantitative problems in the 12th edition, lists of questions by difficulty level and content area, *plus* all of that information for the 11th edition, as well.

**About the author:** *Jeff Sackmann has written many
GMAT preparation books, including the popular Total GMAT Math,
Total GMAT Verbal, and GMAT 111. He has also created
explanations for problems in The Official Guide, as well as
1,800 practice GMAT math questions.*

Total GMAT Math
The comprehensive guide to the GMAT Quant section. It's "far and away the best study material
available," including over 300 realistic practice questions and more than 500 exercises! |