Most expensive book in the world is the Leicester Codex, written by Leonardo da Vinci. The winner of the most expensive book in the world has become the richest man in America, Bill Gates. The code was sold for million dollars in 1994
Leonardo da Vinci : Joseph Beuys. The Codex Leicester from Today's Perspective, installation view, Haus der Kunst, 1999, photo Wilfried Petzi
His Books: Codex Atlanticus Codex Windsor Codex Arundel Codex Trivulzianus Codex Forster Paris Manuscripts Codex Madrid Codex Ashburnham Codex on the Flight of Birds Codex Leicester Codex Urbinas Collection of notebooks that document his findings on science, math, and art.