We were charmed to the core over this ingenius book storage idea. Yes, these are just planks of painted plywood nailed to the supports for the loft above. They create perfect cubby spaces to store books, baskets and even small lights. Since we're in California, it would probably be a good idea to secure everything in place so it doesn't shake right off.
It helps that the ceiling is lower than a normal one, so you can actually reach the books. But we thought it was a pretty slick way of storing books in a small space without taking up a lot of the walls or floor. It doesn't hurt that so many of the books are neutral colors too. What do you think? Have you got a space this'll work in?