What can you do with a book no one can read?
The Voynich manuscript fits the description. It's written in a language no one has identified in centuries, and features lots of strange paintings and illustrations as well.
Earlier today, a Spanish publisher, Siloe, earned the rights to make more of these unreadable books. Specifically, it can make 898 copies, according to The Guardian.
Before Sunday, the book was kept at a Yale library.
Although apparently Indiana Jones can read it whenever he wants.
So who wants the "world's most mysterious book"?
The 200-page manuscript got its name after Wilfrid Voynich bought it in 1912. Scientists have pinned its age between 1404 and 1438. Theories about it abound. Some think it's a book of magic spells. Others think it's Leonardo da Vinci, who was known for writing in code. Others think it's a huge hoax.
Even the plants drawn in the book haven't been identified, and top code breakers haven't figured it out.
Or, of course, maybe this YouTube user already cracked the code.