In a post a few days ago, I talked about BookRabbit.com — a (fairly new) site which lets readers share the titles of books they own, in hopes of discovering other books they might be interested in. The clever mechanism which BookRabbit have come up with for communicating this information is bookshelf photographs: take a photo of a bookshelf, and go through every (or at least many) of the books displayed thereon, “tagging” them by title, edition, and so on.
I found this impossible to resist.