This has to be some kind of proposal first. A man proposed marriage in a very literary fashion and then posted the video to Youtube. He inscribed the proposal in a book, then placed the ring in a hollowed out section of the book, which he carefully placed back on the shelf. Take a look:
So what happened next? Did she say yes? Was that really a library book? (surely not). Did the librarians shush him? Did some unsuspecting library patron get a big surprise when he or she pulled that particular book off the shelf? We need an ending to this story.