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.Postmark Ganymede by Robert SilverbergAuthor: Silverberg, Robert, 1935-,Language: English, Class: PS: Language and Literatures: American and Canadian literature, Release Date: May 27, 2008