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 New Hylid Frogs From Mexico and Central America by DuellmanAuthor: Duellman, William Edward, 1930-,Language: English, Class: QL: Science: Zoology, Release Date: Sep 28, 2010