5 rarest books from history The Codex Leicester, a notebook by Leonardo da Vinci, is one of the most expensive books ever sold. True False None Only one complete copy of the Gutenberg Bible exists today. True False None The Book of Kells is an illuminated manuscript created in the 9th century. True False None The Voynich Manuscript is a medieval book written in an unknown language that has been fully deciphered. True False None A first edition of Alice’s Adventures in Wonderland is one of the rarest children’s books. True False None Time's up Most Popular