Gustavus Cheyney Doane, a gifted but tormented cavalryman known as "the man who invented Wonderland"; the ambitious former vigilante leader Nathaniel Langford; scientist Ferdinand Hayden, who brought photographer William Henry Jackson and painter Thomas Moran to Yellowstone; and Gen. Phil Sheridan, Civil War hero and architect of the Indian Wars, who finally succeeded in having the new National Park placed under the protection of the US Cavalry.  George Black's Empire of Shadows is a groundbreaking historical account of the origins of America's majestic national landmark.