You can learn a lot about someone by seeing what books they’ve kept. Perusing someone’s bookshelf can lead to great conversations as you see what interests they have and what you might have in common.
I confess that I do this all the time. I’m always perusing the bookshelves of my friends. It does tell you something about them, the kinds of books that they read. But as the post goes on to point out, what happens when someone’s personal library is on an ebook reader? Will the question, “Can I see your reader?” become a standard question on dates and when meeting new people?