Project Gutenberg was the first provider of free electronic books, or eBooks. Michael Hart, founder of Project Gutenberg, invented eBooks in 1971 and his memory continues to inspire the creation of eBooks and related technologies today.The Discovery of Yellowstone Park by Nathaniel Pitt LangfordAuthor: Langford, Nathaniel Pitt, 1832-1911,Language: English, Class: F721: United States local history: Rocky Mountains. Yellowstone National Park, Release Date: Feb 1, 2004