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.Spanish Explorers in the Southern United States, 1528-1543. by Casta?eda de Nájera et al.Author: Nú?ez Cabeza de Vaca, Alvar, active 16th century,Language: English, Class: E011: History: America: America, Release Date: May 29, 2013