New MCAT...Old Material?

<p>Simple question would it be wiser to purchase MCAT prep books that have came out prior to the new MCAT test or should one wait for new prep to be released? Or does it matter? I'd love some opinions.</p>

<p>The question format is slightly changed for the new exam, incorporating multiple concepts in the questions. It may be better simply to buy the new books. So far Kaplan, Princeton Review and Examcrackers has material available. The Berkeley Review books would still be good for content review. DS has the new books so that he can get the practice test since there are so few full length test options. </p>