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.Field Book of Common Rocks and Minerals by Frederic Brewster LoomisAuthor: Loomis, Frederic Brewster, 1873-1937,Language: English, Class: QE: Science: Geology, Release Date: Aug 18, 2017