* _Mr. Lincoln and Friends: How America's Greatest President Made Extraordinary Friends and Ended Slavery_ (2021)
* _The Power of the Purse: How Woman Won the Vote_ (2018)
* _A Lady For Liberty_ (2016)
* _The Tragic Fate of the World War II Nurse_ (2015)
* _The Danger That Never Was_ (2014)
* _Blood and Germs_ (2012)
* _Sins of Omission_ (2009)
* _The True Story of Jamestown_ (2008)
* _William Smith, Founding Father_ (2007)
* _A Divine Providence: The Remarkable Life of Elizabeth Blackwell, America's First Woman Doctor_ (2005)
* _Assistant, Please: The Remarkable Life of Miss Grace Hopper, America's First Admiral_ (2004)
* _Lincoln's Admiral_ (2002)
* _The Captain America Complex_ (2002)
* _The Admiral and the Lady: The Friendship Between America's First Admiral, Grace Hopper, and the Commander-in-Chief, Dwight D. Eisenhower_ (2001)
* Articles and Essays:
* "The Woman Who Won the Vote" (_Smithsonian_ Magazine, December 2018)
* "How Women Won the Vote" (_History_ Magazine, August 2018)
* "The Tragic Fate of the World War II Nurse" (_Civil War Times_ Magazine, April 2017)
* "The Danger That Never Was" (_MHQ: The Quarterly Journal of Military History_, Winter 2015)
* "Blood and Germs" (_The Wall Street Journal_, August 2012)
* "Sins of Omission" (_The New York Times_, February 2009)
* "The True Story of Jamestown" (_Smithsonian_ Magazine, December 2007)
* "William Smith, Founding Father" (_The William and Mary Quarterly_, January 2007)
* "A Divine Providence: The Remarkable Life of Elizabeth Blackwell, America's First Woman Doctor" (_The New England Quarterly_, September 2005)
* "Assistant, Please: The Remarkable Life of Miss Grace Hopper, America's First Admiral" (_The Journal of the American Revolution_, Summer 2004)
* "Lincoln's Admiral" (_Civil War Times_ Magazine, August 2002)
* "The Captain America Complex" (_The Weekly Standard_, July 2002)
* "The Admiral and the Lady: The Friendship Between America's First Admiral, Grace Hopper, and the Commander-in-Chief, Dwight D. Eisenhower" (_The New York Times_, May 2001)