[chrisjarvis]

That would be extremely cool for many niche interests and hobbies.

I think it would be a lot of work for book store owners however because along with taking pictures they would also need to fill in some metadata as well about the book to make any kind of searching/categorizing possible. Maybe an intrepid entrepreneur could start with a few bookstores and do that categorization for them as a "do things that don't scale" experiment.