Relying solely on prep books for exam?

Hi! I’m taking the AP Human Geography exam in May, and I was just wondering if it was possible to use only prep/review books to study without any class materials. I have both the Princeton Review book as well as the Kaplan book. I have notes I’ve taken throughout the school year from my textbook, but I’m really hesitant to use them since they lack material covered in the prep books and cover material not in either of the books. What should I do if I want to get a 5 on the exam?

(P.S. I’m fully aware the format for the exam has changed. I still want to study as if it hasn’t just to be fully prepared.)