A long time ago, I had made some book shelf shelves out of cardboard so I could see more books on a shelf than normal. Today, I was cleaning up the garage and found some scrap wood so I made some more out of wood this time. No lights on this batch, but that can come later.
The first two I made was out of a junk MDF board.
The next one I made was from a much nicer scrap. I made this one a bit shorter as the shelf it went on was one peg shorter than the rest of the shelves.
I even went so far as counter-sinking the screws so the books don’t snag on screw heads.