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.Married Love: A New Contribution to the Solution of Sex Difficulties by StopesAuthor: Stopes, Marie Carmichael, 1880-1958,Language: English, Class: HQ: Social sciences: The family, Marriage, Sex and Gender, Release Date: Nov 30, 2014