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.An Inquiry into the Causes and Effects of the Variolae Vaccinae by Edward JennerAuthor: Jenner, Edward, 1749-1823,Language: English, Class: RC: Medicine: Internal medicine, Release Date: Jul 15, 2009