<p>What is the best ACT prep book? The official one from the ACT? Princeton Review? Or any other companies?</p>
<p>I used Kaplan... I think my score would have been higher if I had reviewed it more thoroughly. Can't say about the other companies, but I would recommend Kaplan.</p>
<p>I would not recommend Kaplan's. I used Kaplan's and my math score decreased and everything else stayed the same. I need to retake the ACT for a scholarship and I will definitely not be using Kaplan's.</p>
<p>Whether or not you get another prep book, definitely get the official one, since that has real tests. PR and Kaplan practice tests are OK, by they're not exactly like the real tests.</p>