Mr Santelia has given several of his books to public figures over the years, including former US Presidents Bill Clinton, George Bush and Barack Obama.
The number of books Mr. Santelia has typed backwards has set a Guinness world recordThe books must be typed using "mirror writing," which produces a copy of the usual writing in any given language.
Leonardo da Vinci left few finished works at his death in 1519, and some were later lost or destroyed. Those that remain show Leonardo’s innovation and skill. Find out which ones are the most famous.
Das taz-Quiz zu den Olympischen Spielen: Noch Fragen? taz.de - get the latest breaking news, showbiz & celebrity photos, sport news & rumours, viral videos and top stories from taz.de Daily Mail and Mail on Sunday newspapers.
Leonardo da Vinci: Ahnenforscher machen erstaunliche Entdeckung ingenieur.de - get the latest breaking news, showbiz & celebrity photos, sport news & rumours, viral videos and top stories from ingenieur.de Daily Mail and Mail on Sunday newspapers.