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.Principles of Public Health by Thomas Dyer TuttleAuthor: Tuttle, Thomas Dyer, 1869-,Language: English, Class: RA: Medicine: Public aspects of medicine, Release Date: Jan 16, 2017