A book exists. It is sitting right now in a climate-controlled vault at Yale University. It has been photographed, digitized, and made freely available online. Professional cryptographers, linguists, historians, and astronomers have studied it for over a century. The NSA has studied it. The greatest codebreaker of the twentieth century studied it for years and walked away without an answer.

Not one word of it has ever been decoded.

The Voynich Manuscript is a five-hundred-year-old book written in a script that matches no known language, filled with detailed illustrations of plants that do not exist, star charts for constellations no one recognizes, and page after page of small nude figures arranged in elaborate systems of pools and tubes that make no physical sense. The vellum is real. The ink is real. The hand that wrote it was confi ...