<p>Studying from the Red Book doesn’t necessarily help your chances of scoring highly on the real thing. I took all the practice tests from it within about 2 weeks prior to the real ACT, and felt really confident. However, I found the ACT on that particular test date (sept) was extremely harder than any of the practice tests I took. It could have just been chance, because I the ACTs in April and June were a lot easier, and I didn’t even study as hard for them as I did the September one.</p>