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 Flying Machine Boys on Duty; Or, The Clue Above the Clouds by Frank WaltonAuthor: Walton, Frank,Language: English, Class: PZ: Language and Literatures: Juvenile belles lettres, Release Date: Oct 9, 2015