The Voynich Manuscript is a special kind of original. We know, thanks to carbon dating, that it was put together in the early fifteenth century. But no living person has ever, as far as we know, understood it. Nobody can decode the language the book is written in. It has no title and no author. A new facsimile, edited by Raymond Clemens and published by Yale University Press, draws attention to the way that we think about truth now: the book invites guesses, conspiracy theory, spiritualism, cryptography. The Voynich Manuscript has charisma, and charisma has lately held a monopoly on our attentions.