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.Marriage Enrichment Retreats: Story of a Quaker Project by D. R. Mace and Vera MaceAuthor: Mace, Vera, 1902-,Language: English, Class: HQ: Social sciences: The family, Marriage, Sex and Gender, Release Date: Sep 3, 2009