The Official SAT Study Guide, 2nd edition

Comment: Don't bother with practice tests from Kaplan, Barrons, etc. The tests in this book are created with the same secret set of rules as are actual SAT tests, so the tests in this book are far better for practicing with.

Only complaint is that there are a few typos.

50 hours with this book increased my score from 2130 to 2330. That's an increase from the 97.2nd percentile to the 99.8th percentile, from 1/35 rarity to 1/500 rarity. That increase really speaks for itself about how much this book helped me. Easily worth the money and time.

Comment: This book contains several mistakes in the answer keys. It comes with a sheet of paper correcting the errors, but this shows an unprofessional publishing process. Also, many of the ten tests in the back are repeated from the first edition. Not actually giving 10 new tests.

Comment: i personally think that this is the best SAT prep book out there. My kids used the SAT books published by the College Board and had gotten good results. They scored 790 and 800 in math. Despite of some typos in the latest edition, I still give it 5 stars. I don't believe that other publishers can come up with questions like the College Board. How can a copy be the same or better than the original?

Comment: I can't believe it was possible, but CollegeBoard has improved upon the previous edition of the SAT manual. Now the book has 10 practice tests. This is a must-buy for college-bound students!

Comment: This book is absolutely amazing. It'll give you a sense of what you can expect from the real SAT. Also, the book provides little hints and thorough explanations that will most definitely improve your SAT score. Highly recommended!