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 Aviator's Field Book by Oswald BoelckeAuthor: Boelcke, Oswald, 1891-1916,Language: English, Class: D501: History: General and Eastern Hemisphere: World War I (1914-1918), Release Date: Sep 17, 2009