This bookcase I build for each of my kids when they went to college. The first one about 10 years ago. The purpose was to have something that will be flexible in space, easy to move from place to place and sturdy enough to hold books, stereo or a TV, and to last a few years. The supports are made of 3/4” white oak from left over wood floors. The frames are a basic stile and rail construction using pocket holes . This one is 48” high and there are 4 panels joined to each other with hinges. When not needed, the shelves slide out and it folds into a flat screen. It looks like a “Japaneses Shoji screen”, but with empty spaces in between where the shelves, made of plywood with solid edges, go across the stiles. The first one I build was tenon and mortise and was 7 feet high. I did not made a plan, may be a drawing, but is long gone.