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Little is known about Euclid, fl. 300BC, the author of The Elements. He taught and wrote at the Museum and Library at Alexandria, which was founded by Ptolemy I. Almost everything about him comes from Proclus' Commentary, 4th cent AD.
Want to know who invented the book? Johann Gutenberg is nearly universally credited with being the inventor of the printing press, and the father of the modern printed book. Gutenberg was an early communications catalyst who invention of the printed book opened up the world to the quick and efficient spread of knowledge and ideas.