Take hi res pictures, then do character recognitn (Score 1)

Take hi resolution pictures of all the shelves, then use character recognition on the images. (Some coding required.) I imagine you would have the picture of the shelf that the book is on pop on your screen with some kind of indication where the book is. Also a floor plan indicating what shelf it is. When you use a book you will have to put it back exactly where you got it from. No further organizing required.