Patrick K. O'Donnell is a bestselling author and critically acclaimed military historian specializing in elite units and irregular warfare. He has written 13 books, including "Washington’s Immortals: The Untold Story of an Elite Regiment Who Changed the Course of the Revolution," "The Unknowns: The Untold Story of America’s Unknown Soldier and WWI’s Most Decorated Heroes Who Brought Him Home," and "First SEALs: The Untold Story of the Forging of America's Most Elite Unit." His works have earned widespread praise, with "Beyond Valor" receiving the William E. Colby Award for Outstanding Military History, and several titles appearing on the U.S. Marine Corps Commandant’s Professional Reading List. Described as "nonfiction that reads like fiction," his books have been featured by major media outlets and selected by prominent book clubs.
O'Donnell combines rigorous scholarship with firsthand combat experience, having served as a civilian combat historian during the Battle of Fallujah, where he documented Marine operations while embedded with a rifle platoon. A leading expert on the Office of Strategic Services (OSS), he has written extensively on World War II espionage and special operations, including "The Brenner Assignment: The Untold Story of the Most Daring Spy Mission of WWII" and "They Dared Return: The True Story of Jewish Spies Behind the Lines in Nazi Germany." His research has influenced documentaries, films, and video games, including historical consulting for DreamWorks' "Band of Brothers" and the "Medal of Honor" franchise.
Recognized as a premier authority in his field, O'Donnell has received accolades such as the OSS Society’s John Waller Award for intelligence history scholarship. A Fellow at Mount Vernon, he frequently lectures for government agencies and military branches, including U.S. Army Special Forces and the Office of the Director of National Intelligence. His forthcoming book, "The Unvanquished: The Untold Story of Lincoln’s Special Forces, the Manhunt for Mosby’s Rangers, and the Shadow War That Forged America’s Special Operations," continues his tradition of uncovering pivotal yet overlooked narratives in military history.