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.Behind the Green Door by Mildred A. WirtAuthor: Wirt, Mildred A. (Mildred Augustine), 1905-2002,Language: English, Class: PZ: Language and Literatures: Juvenile belles lettres, Release Date: Dec 7, 2010