A Book By The Cover

So I'm at the store and I notice that on every shelf all the books are turned facedown so the back cover is displayed. I found it rather odd, interesting. At first I thought I was seeing things, but as I wandered aisle by aisle, it was the same. Other people were browsing through the store and I wondered what was going on. The thought crossed my mind that it had to be some sort of prank. Someone must have methodically gone through the book section and turned every book around. I decided to tell a clerk. It was done intentionally, for inventory purposes. Made sense, but just not during shopping hours. I still think it's kind of funny though.