<p>I'm taking SAT. I feel a little weaker at Math and essay. So which book should I purchase? (I've already got a Kaplan, Barron 2400)</p>
<p>Gruber’s has a good and extensive math refresher. And maybe you need the blue book.</p>
<p>You should get the Barron’s SAT Study Guide. It’s great for math!
Kaplan 2400 has some good strategies for the essay as well.</p>