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.Der Rubin by Gustav SackAuthor: Sack, Gustav, 1885-1916,Language: German, Class: PT: Language and Literatures: Germanic, Scandinavian, and Icelandic literatures, Release Date: Dec 19, 2010