Did you purchase a set of books or did you purchase a Self Study package (which also includes a set of books)? The Study Organizer does come with the Self Study package; I'm not sure whether it comes with just a set of books.
If you are using a self-study package, the Study Organizer is located in your Student Center. If you have any problems locating it, please contact
studentservices@manhattangmat.com or call 800.576.GMAT.
If you purchased a set of books, I took a look at our online store, and it doesn't say anything about the Study Organizer coming with the books. I don't actually sell this stuff myself, though, so I don't know for sure. :) Contact
studentservices@manhattangmat.com or call 800.576.GMAT and they will know for sure what's included based on what you bought.