Move over, Da Vinci Code!

In a world full of bullshit disguised as 'mystery', the Voynich Manuscript stands alone as a true and beautiful enigma.
Named after one of its recent buyers, this book from the 15th or 16th century is in an undecipherable language and script. Statistical analysis shows it to be natural language, not random scribbling.
The illustrations suggest that the book is European. But the text cannot be mapped to any European language. Some guess that it's a transcribed Oriental language. Leading cryptographers have tried, unsuccessfully, to decode it.
Truly, the Voynich Manuscript deserves the title 'Most Mysterious Book of All Times'.
See Wikipedia entry on the Voynich manuscript