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 Oper

Patrick K. O'Donnell is a bestselling, critically acclaimed military historian and an expert on elite units. The author of thirteen books, including The Indispensables, The Unknowns, and Washington's Immortals, he is the recipient of numerous national awards. O'Donnell served as a combat historian in a Marine rifle platoon during the Battle of Fallujah and is a professional speaker on America's conflicts, espionage, special operations, and counterinsurgency. He has provided historical consulting for DreamWorks' award-winning miniseries Band of Brothers and for documentaries produced by the BBC, the History Channel, and Discovery.