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.Zweierlei Denken: Ein Beitrag zur Physiologie des Denkens by August BüttnerAuthor: Büttner, August,Language: German, Class: BF: Philosophy, Psychology, Religion: Psychology, Philosophy, Psychoanalysis, Release Date: Sep 23, 2007