If you need to know it, it's in this book! The 2013 edition of Cracking the AP U.S. Government and Politics Exam has been optimized for e-reader viewing with cross-linked questions, answers, and explanations. This eBook includes:

2 full-length practice tests with detailed explanations for each multiple-choice question, plus full breakdowns of how to tackle the free-response questions
In-depth reviews of all AP U.S. Government & Politics topics, including the institutions of government, elections, political parties, interest groups, public policy, civil rights, constitutional underpinnings, and more
A comprehensive glossary of key U.S. Government & Politics terms
Useful techniques for cracking the free-response section
Updated strategies that reflect the AP test scoring change