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 Die Varieties of the Nesbitt Series of United States Envelopes by BertholdAuthor: Berthold, Victor Maximilian, 1856-1932,Language: English, Class: HE: Social sciences: Transportation and communications, Release Date: Jun 15, 2012