I'm done with these books and have not written in any of them. I did use the codes in some of the Manhattan books for the practice tests but I recommend using the free official GMAT tests to study anyways especially for the verbal sections. All prices do not include shipping. If you are in Houston though you can just come pick them up. I would like to sell them all together.

2015 Official GMAT Guide - $15

Aristotle Sentence Correction Grail 3rd Edition - $15

Manhattan Prep Advanced Quant 2nd Edition - $10

Powerscore Critical Reasoning Bible 2015 Edition - $15

Manhattan Prep Complete Study Guide Set (Set of 10 Books) - $100

Price for all of them together: $130

PM me or email my at my username @ gmail