An APUSH review book is a study guide specifically designed to help students prepare for the Advanced Placement United States History exam. These books typically include summaries of key historical events, analysis of important themes and concepts, practice questions, and tips for how to effectively study and prepare for the exam. Popular APUSH review books include "The American Pageant," "AP U.S. History Crash Course," and "Barron's AP United States History." Using an APUSH review book can help students reinforce their understanding of key concepts and improve their performance on the AP exam.