Etsy seller TheBlackSpotBooks sells a library in necklace form -- a collection of 11 miniature blank-books bound in scrap and antique leather. I love the idea, though I'd love it more if the books had tiny little printing, the text of great public domain works.
I write books. My latest is a YA science fiction novel called Homeland (it's the sequel to Little Brother). More books: Rapture of the Nerds (a novel, with Charlie Stross); With a Little Help (short stories); and The Great Big Beautiful Tomorrow (novella and nonfic). I speak all over the place and I tweet and tumble, too.