That would be a pretty cool app, at least for people who have a lot of books.
A couple of times I've resorted to taking photos of my books when I just could not find one, so that I could look in the photos on my computer (where I can enlarge them and do not have to bend over uncomfortably to see the lower shelves) to find where the book was shelved.
A couple of times I've resorted to taking photos of my books when I just could not find one, so that I could look in the photos on my computer (where I can enlarge them and do not have to bend over uncomfortably to see the lower shelves) to find where the book was shelved.