no you can't, the outside shell of each shelf completely hides what's inside. I wanted to reconfigure a shelf (turn it on it's side, combine it with another) and turns out the "boards" are hollow. There is something inside at the corner pre-drilled-screw anchor points, but that's the only place you can attach something, the rest of it is potemkin shelf. You get to see this in more detail if you keep a shelf in a mildly humid place like a beachhouse, as the whoe thing delaminates and you see cardboard honeycombs inside a thin veneer of ...veneer