Part of the mystery behind an 'alien' book no one can read has at last been unraveled. Found in a chest of books outside Rome by a dealer in antique books, the Voynich manuscript is among literature's great mysteries. The book of aging parchment is written in alien characters, some resembling Latin letters, others unlike anything used in any known language, and arranged into what appear to be words and sentences -- except they don't resemble anything written or read by human beings.