There are many AP United States History review books available on the market, but some popular options include:
1. "AP United States History: An Essential Coursebook" by John J. Newman and John M. Schmalbach
2. "Barron's AP United States History" by Eugene Resnick
3. "The Princeton Review AP U.S. History Premium Prep, 2021" by The Princeton Review
4. "Cracking the AP U.S. History Exam, 2021 Edition" by The Princeton Review
5. "5 Steps to a 5: AP U.S. History" by Daniel P. Murphy
These books offer comprehensive coverage of the AP US History exam material, practice questions, and test-taking strategies to help students prepare for success on the exam. It's important to choose a review book that aligns with your learning style and study preferences.