Instruct: Classify Amazon reviews into positive or negative sentiment
Query: A good review book.

PR has done a fairly good job with Cracking the AP U.S. History. The review chapters are good summaries to go along with the lengthy textbook readings. The practice exam contains questions that are very similar to real AP questions. However, there is only one practice test. The AP European History book from PR has two tests, so why doesn't the APUSH book? Also, do not rely solely on the PR review chapters to prepare for the test. Our school sold us the AMSCO APUSH text. It is a detailed, easy-to-read review of APUSH with lots of realistic practice APUSH questions. That is the best book to have for APUSH.