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.Hovey's Handbook of the Mammoth Cave of Kentucky by Horace Carver HoveyAuthor: Hovey, Horace Carver, 1833-1914,Language: English, Class: F396: United States local history: Old Southwest. Lower Mississippi Valley, Release Date: Jun 3, 2015