Bookcase made of stacked boxes
Hey, this looks just like the bookcases I have in a number of rooms, although mine lack the wooden casings. Sloom & Slordig (Lazy & Messy) came up with this one. BoingBoing shows a more recent design that looks just a little tidier, in case you want things lazy but not so messy. Apparently each box goes for 10 euro, and you can have them made to size.
At first I thought they looked like warehouse pallets, but colorful (kinda like the painted pick up sticks we would play with as kids). Reminds me of my first apartment in college; I used wooden planks from scraps and painted cinderblocks. Much less expensive than €10 apiece.