It’s been called the world’s most mysterious book. It was written between 1404 and 1438 in an unknown script by an unknown author. It’s illustrated with plants and star charts that look tantalizingly like real ones, only not quite. And then there are the women - dozens of naked women entering and emerging from tubes that one writer compared to midieval waterslides . But most perplexing of all is the lettering, which is beautifully formed but completely unintelligible. "It looks like a western