I saw the kusudama tutorial on foldingtrees quite a while ago, and loved it. http://foldingtrees.com/2008/11/kusudama-tutorial-part-1/
It's really simple to do, it just takes time to fold 60 units, then glue them all together.
I used pages from a thrifted Japanese book.
Here you can see the basic unit or petal (farthest right). You glue five units into a flower. Then six flowers into a hemisphere. (I started with papers 4" square.)
Finally, you glue two hemispheres into a ball, traditionally with a string loop for hanging in between, but I used a bamboo skewer instead. It was tricky getting the two halfs to stay positioned so that all those surfaces were touching while the glue was still wet, so I used bobbypins.
It looks nice in a vase, but in my head I imagine it displayed with the skewer placed between books on a full shelf. I gave it to a friend for her birthday, and never tried it with the books.