I love art repurposed out of vintage items especially books. I've seen some really cool stuff done with old books over the years but this one may take the cake. Lisa Occhipinti is a painter, book artist, and author based out of souther California. While I love all her work, her book mobiles are my favorite.
If you are thinking that these look like a great DIY project, you are absolutely right. Do yourself a favor though, and pick up her book "The Repurposed Library" which gives you step by step instructions on how to do this and other projects.