I bought a set of PCAT books 3 years ago, thinking I was ready to take the exam. I decided not to take it, b/c I hadn't taken Organic Chemistry, Calculus, and I only had the basic Bio 101 behind my belt. Im going to take the exam this summer, but do you think I need to buy new books or can I just study from the ones I bought 3 years ago? I paid over $200 for them. Im not sure if the info on the test has really changed that much. They're basically 2011 books from Kaplan and McGraw Hill. Any responses are appreciated!