We're releasing an iPhone app called Biblio. Biblio is a Google Books client for the iPhone that allows users easily add books to their Google Books library by scanning barcodes on their books. Even though Google Books may be synonymous with Search, this app is more about managing a library: adding books to shelves, moving books around, etc.
We need an app icon designed for the app. It will appear on the iPhone in the various places app icons do, in addition to the Apple app store. It must look good at following sizes: 29x29, 57x57,114x114 and 512x512. Deliverable should be, at a minimum, a png at 512x512 if it scales down well.
It's an app about managing books on shelves in a library so the imagery is fairly obvious. I think the emphasis should be shelves, but there are no restrictions, be creative as you like.