Today’s invention is a way for users of libraries and bookstores to make more effective use of the book stacks.
Each book would be equipped with a barcode on the spine.
Scanning the spine of the book with your phone would cause a stored text-to-speech recording of the book’s blurb to play (audible by using earbuds, so as not to disturb other browsers).
This would allow people to make a quicker assessment of publications, without having to extract books from shelves.