"Washington's Immortals" by Patrick K. O'Donnell is a Trade Paperback published in 2017 by Grove/Atlantic, Incorporated. It is a biography focusing on the military history of the United States during the Revolutionary Period (1775-1800), specifically highlighting the role of George Washington and his military tactics. The book is illustrated and contains 480 pages, making it a detailed exploration of this crucial period in American history. O'Donnell's work is a valuable contribution to the genre of biography and history, offering readers insights into the military strategies of Washington and the challenges faced during the revolutionary era.