- The Last Battle: The End of World War II and the Fate of the World (2015)
- The American Revolution: A History in Documents (2017)
- The Civil War: A History in Documents (2019)
- The First World War: A History in Documents (2021)
- The Second World War: A History in Documents (2023)
In addition, McMullen has also written a number of articles and essays on American history, including:
- "The American Revolution and the Birth of Democracy" (2017)
- "The Civil War and the Fight for Freedom" (2019)
- "The First World War and the Rise of the United States" (2021)
- "The Second World War and the Fate of the World" (2023)
McMullen's work has been widely praised by historians and critics alike, and he has been described as "one of the most important historians of our time." He is a regular contributor to The New York Times, The Washington Post, and The Wall Street Journal, and his work has been featured in numerous documentaries and television programs.
McMullen currently teaches history at the University of Chicago, where he is a Professor of History and the John U. Nef Distinguished Service Professor of History. He received his Ph.D. in history from Yale University in 1992.