I'm weak on DS questions as I got 9 wrong and 6 right out of 15 questions
Dig deeper - that's not enough to tell me for sure that you're weak on DS. I'll give you an example: it's not unusual for me to work with students who spend way too much time on some PS questions and rush on DS to make up the time. Then, their DS percentage correct is low, so they think DS is bad... but it's not really. It's because they're rushing when they shouldn't be rushing. You have to look at the data collectively.
Did you use that article I linked to above, for how to analyze your test results? If you did, then justify your comments with more data. If not, go use it now, then post again.
You're right - we don't have any bookstores in Lebanon that carry our books. If you really want them, your best bet would be to order from a nearby country (if the shipping fees are not too high). Strictly geographically, I think the Magrudy's chain (Dubai, UAE) might be closest, but that doesn't mean the shipping is cheapest from there. Look here and see what you can find:
http://www.manhattangmat.com/intl-book-stores.cfmFor quant, there are materials for the Foundations of Math program - that's the first level. And then the next level is the General chapters of the red strategy guides (books). The next level after that is the Advanced chapters of the red books.
Take the Basic Math Diagnostic Quiz (you can find this in your student center) and see what your results are. If they're low enough (and there's a scale there to tell you what "low enough" means), then yes, start with the Foundations of Math work on the website first, and then go the General chapters. If the score is high enough, then you can start straight in with the General chapters (if you can get the books, of course).
If you can't get our books, then you'll have to get some other books. You're already getting the SC book, but it looks like you also need something for RC, Geom, and Algebra. So, either see what you can do about getting ours or start doing some research into other available books so you can decide which ones to get.
As a general rule, I will also say that if you want a 700+, you pretty much need all of the books for a program - you need to be good at everything for 700+. If you're not looking for that high of a score, then you may be able to get away with just attacking your weaker areas.