<p>1) Pretty much all the sat prep books help prep for sat in some way. The thing is which book is best for studying than the others. That’s why most people stick with Cb textbooks, since they’re the ones administering the test.</p>
<p>2) You don’t need to memorize they many. O recommend you check out Direct hits core vocabulary. I think they can out with 2 vocab books or so. also study root words. You can just Google those.</p>
<p>3) Take it when you feel comfortable. But you should take it at least once your junior year. I don’t know if they do it internationally but in US if you apply for free lunch then you can apply for free waivers which let you take the Sats multiple times. </p>