Books I have purchased:
The Official Guide 12th Edition
Manhattan GMAT Sentence Correction
The Official Guide Verbal Review
The Official Guide Quantitative Review
Powerscore Critical Reasoning Bible
Manhattan GMAT Simulation Booklet
After opening the Official Guide math book and not knowing how to do any of the problems I signed up for a Math Refresher course at UCLA Extension.
I dropped so much money on test prep. I know it's worth it. Well, I hope it's worth it.