I think this is definitely the best prep book for AP USH. Amazon Price: $ 15- $ 20 for paperback. Best AP US History Review Book: Cracking the AP US History Exam, Premium Edition. In contrast, this book was written specifically to match up with the AP US History guidelines, including the new course objectives College Board came up with as of - 15. I read this prep book over a few times and got a 5 on the AP exam and an 800 on the SAT II.