达·芬奇手记（珍藏版）

72 pages of codex comes from the most famous script by Da Vinci, relating to many fields including illustrations and rough drifts of astronomy, geography, construct, water conservancy and fossil, even optics. There was large amount of fantastic knowledge beyond contemporary time. It's value can be assessed from people's craziness about it. The founder of Microsoft Bill Gates got this codex at a price of 30.8 million dollars in 1994 in an auction, which made it the most expensive book on earth and made it well known around the world.