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 Cathedrals and Churches of the Rhine by M. F. MansfieldAuthor: Mansfield, M. F. (Milburg Francisco), 1871-,Language: English, Class: NA: Fine Arts: Architecture, Release Date: Apr 10, 2010