Upcoming senior taking ACT in September! HELP!?

So, I need some help finding prep/test books. So far, I have the Kaplan Math/Science workbook (since those are the sections I need most reviews in) and the Red Book. I'm thinking about buying the Princeton Review 1296, but I'm wary about buying any PR prep books since I think they screwed me over for the SAT. Any help?!?!?!