Well, I'm certainly confused about why some designers on HGTV shows put books in shelves with the spine facing the back of the shelf so the book's title & author cannot be read. This approach seems to have started with Genevieve Gorda, then it was picked up by Sabrina Soto -- and maybe others. I generally love their work, but this thing they do is totally ridiculous and looks absolutely terrible. Can they possibly think this is cute? I have not been able to find a link directly to these designers so I can ask them about this, so can you please ask them to explain why they do it.
I've seen this done also and think it's nuts. As a design professional I've never done this and can't imagine an instance where I would. Books in a room give warmth and coziness - they're like old friends. Why would you turn all your friends with their backs to you?