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.What Social Classes Owe to Each Other by William Graham SumnerAuthor: Sumner, William Graham, 1840-1910,Language: English, Class: HN: Social sciences: Social history and conditions, Social problems, Release Date: Jun 16, 2006