The popularity of Dan Brown's book, The Da Vinci Code, has revitalized interest in this fascinating historical character. Leonardo Da Vinci lived from 1452 - 1519 and is the very definition of the words, "Renaissance Man". His work in anatomy, architecture, engineering, invention, mathematics, music, painting and sculpture are still revered and relevant today. Da Vinci's ideas involved inventions not technically feasible until the twentieth century, and include tanks, helicopters, parachutes and countless others. This eBook contains his complete notes, Volumes I and II, and contains the original plans for what Brown describes as the cryptex. This version is fully searchable and comes in executable format (.exe) for use on any computer running Microsoft Windows.