But this Tetris bookcase might have beaten it for uniqueness. The nice part is that you can put this in a variety of places – as it can increase or decrease in size based on space needs as well. Forget about the description, just look at the pictures:
And here is fully compressed:
I don’t know if it would look better full of books or maybe with only a few items. Price has to be astronomical. Designed by Reinier de Jong, price is not listed but thanks for the link from Apartment Therapy.