Shelves that defy gravity, or at least appear to. This tutorial is simple, cheap, and looks awesome. The only downside is that a book must be destroyed in the process, but if you have a few books that look cool but never get read, this might be worth the sacrifice.
The only thing better than floating books is upside-down floating books! Another simple tutorial. However, since the books are held in place with elastic, it might not be the most practical or versatile, but damn does it look cool.
I like books. I like skateboards. So why not combine the two? Need I say more?
Probably the most quintessentially steampunk item on this page, pipes shelves look awesome and are much easier to make than they look. They'd look fantastic in an industrial styled library. *drools* That would look so cool!
