A simple book shelf with Scandinavian design hints that can be made from one 4×4 piece of three-quarter inch thick plywood.
Two rows to stack your books, and plenty of options for color, all that is needed to make this modern shelf is a few dowels, a drill, and a jigsaw or circular saw.
Depth 7 1/2″
Plywood – 1 Piece of 4′ by 4′ 3/4″ thick ~$10
Dowel Pins – Pack of 50 ~$3
Main Tools: Jig Saw, Drill