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<p>You can buy [Fundamentals</a> of Physics](<a href=“http://www.amazon.com/gp/offer-listing/0471758019/sr=8-3/qid=1392781916/ref=olp_page_2?ie=UTF8&colid=&coliid=&condition=used&me=&qid=1392781916&shipPromoFilter=0&sort=sip&sr=8-3&startIndex=10]Fundamentals”>http://www.amazon.com/gp/offer-listing/0471758019/sr=8-3/qid=1392781916/ref=olp_page_2?ie=UTF8&colid=&coliid=&condition=used&me=&qid=1392781916&shipPromoFilter=0&sort=sip&sr=8-3&startIndex=10) new for $30. Believe me when I say a proper textbook is nearly mandatory if you want to learn physics and have sufficient practice in solving problems. For AP Physics C, you will want to finish Chapters 1 - 15 and 21 - 32 in Fundamentals of Physics. </p>