- To Serve America: A Brief History of the US Government (2004)
- The First Ladies: A History of the Women of the White House (2005)
- The US Constitution: An Introduction to the Structure of American Democracy (2007)
- Presidential Campaigns and Elections in American History: A Comprehensive Guide (2009)
- US Political History: A Concise Encyclopedia (2011)
- The Supreme Court: A Guide to Its History, Structure, and Landmark Decisions (2013)
- The American Revolution: A History of the Events and People That Led to the Birth of the United States of America (2015)
- The Civil War in the United States: A Concise History (2017)
- The Cold War: A History of the Global Conflict Between the United States and the Soviet Union (2020)
Articles and Essays:
- "George Washington: The Father of His Country" (2002)
- "Abraham Lincoln: The Emancipator" (2004)
- "Franklin D. Roosevelt: The New Deal and the Great Depression" (2006)
- "John F. Kennedy: The Cuban Missile Crisis and the Cold War" (2008)
- "Ronald Reagan: The Cold War and the American Century" (2010)
- "The Declaration of Independence: A Symbol of American Freedom" (2012)
- "The Gettysburg Address: A Call for Unity and Purpose" (2014)
- "The Emancipation Proclamation: A Pivotal Moment in American History" (2016)
Other:
- US Government & Politics: A Study Guide for Students (2006)
- Presidential Quiz Book: A Collection of Challenging Questions and Answers About the Presidents of the United States (2008)
- US Constitution Quiz Book: A Collection of Challenging Questions and Answers About the US Constitution (2010)