The Mysterious Manuscript
The Voynich Manuscript came to light through the hands of a book dealer. If it were a readable text, it may have been lumped with other history books. Because no one has discerned the meaning of the text and the drawings are sometimes fantastical, sometimes allegorical, and sometimes discernible, it has caught the interest of code-breakers, computer analysts, ambitious academics, and even a few novelists.
Claims of having decoded it have appeared in the press for years, but there is still no convincing translation that holds water when applied to the book as a whole.
If you are interested in learning how the manuscript made its journey to the Yale Beinecke Library, René Zandbergen has created an extensive discussion of the history of the Voynich Manuscript.