Instead of re-buying your entire library for some "convenient" e-reader like a sucker, just get yourself one of these circular walking bookshelves. Bing-badda-boom, your entire library is now mobile. Pretty perfect, right?
Actually, stopping may be a problem.
Believe it or not, this thing isn't just a quick Photoshop, either. Artist David Garcia actually built a prototype, which you can see hanging out in the right hand side of this photo from a Chinese exhibit he attended.