Kitchen or anywhere DIY. Seems simple enough, depending on your gap between shelves, anywhere from ropes to ropes for your spacing. You could even use wider wood, just adjust your rope length to accommodate your width and height of your shelves.
I have a ton I books which sit on a shelf that serve no purpose any longer. Keeping the essentials and adding more decor looks much more appealing. Add a well decorated bookshelf to a room, best/easiest decorating secret ever!