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.Arteriosclerosis and Hypertension, with Chapters on Blood Pressure by WarfieldAuthor: Warfield, Louis M. (Louis Marshall), 1876-,Language: English, Class: RC: Medicine: Internal medicine, Release Date: Oct 9, 2011