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 Door Through Space by Marion Zimmer BradleyAuthor: Bradley, Marion Zimmer, 1930-1999,Language: English, Class: PS: Language and Literatures: American and Canadian literature, Release Date: Nov 6, 2006