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.The Montessori Elementary Material by Maria MontessoriAuthor: Montessori, Maria, 1870-1952,Language: English, Class: LB: Education: Theory and practice of education, Release Date: Jun 4, 2013