World's Oldest Book :: Buddhism's DIAMOND SUTRA (868 A.D., 600 years prior to Gutenberg) . [Aurel Stein & the Caves of Thousand Buddhas, 500 painted caves hand-carved into a cliff just outside Dunhuang in Gansu province, China] - http://www.huffingtonpost.com/joyce-m...
"The book unwittingly came to light when a Chinese monk clearing sand from a Buddhist meditation cave in 1900 noticed a crack in a wall. It suggested the outline of a doorway. Plastered over and painted, the entrance had been deliberately concealed. The monk, Abbot Wang Yuanlu, broke in and discovered a small chamber, about nine feet square and full from floor to ceiling with scrolls. They had been hidden and perfectly preserved in the dark, dry grotto for 1,000 years. Although he didn't know it, among the nearly 60,000 scrolls was the Diamond Sutra of 868 A.D., a woodblock printed scroll, more than 16 feet long, complete and dated, with an instruction that it be given away for free. And it was printed on paper, a material unknown in the West for another couple centuries. Ironically, this enduring scroll, with its illustrated frontispiece depicting the Buddha teaching his disciples, is about impermanence. The Diamond Sutra distils Buddhism's central belief that all is change." - Adriano