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.Health Service Support in a Nuclear, Biological, and Chemical EnvironmentAuthor: United States. Department of the Army,Language: English, Class: RC: Medicine: Internal medicine, Release Date: May 24, 2015