How to raise a 33?

<p>So pretty much, I got a 33 (was my 3rd time taking the test) but I didn’t take the writing portion :(</p>

<p>So I have to take it again and while I’m at it, might as well just try to get a higher composite also.</p>

<p>For preparation for the 33 on the ACT, I took around 6 ACT practice tests in which my composites ranged from 32-35. But I never really studied. I just took tests. So would actually studying from books actually help my composite? </p>

<p>Here are my subscores</p>

<p>34 E
35 M
32 R
32 S</p>

<p>If so, any recommendations on books? </p>