A world forever changed... In 1450, all of western Europe's books were hand-copied and amounted to no more than are in a modern public library. By 1500, printed books numbered in the millions. Johann Gutenberg's invention of movable type ignited the explosion of art, literature, and scientific research that accelerated the Renaissance and led directly to the Modern Age. In Gutenberg, you'll meet the genius who fostered this revolution, discover the...