Grammar book?

<p>So i scored much lower than I expected on my May SAT.</p>

<p>I just finished Direct Hits volume 1 and wow it is great, i am starting volume 2 tonight.</p>

<p>Anybody got recommendations for SAT grammar/writing books or online courses?</p>

<p>I already completed the blue book and I'm using the online collegeboard book now as a practice book.</p>

<p>thanks,
dave</p>