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.Descriptions of Two Species of Frogs, Genus Ptychohyla by William Edward DuellmanAuthor: Duellman, William Edward, 1930-,Language: English, Class: QH: Science: Natural history, Release Date: Feb 21, 2010