Diagonal Bookshelf

Buy enough 1x12 lumber to fill the space where the bookcase will stand. Build the bookshelf frame based on the dimensions of the space.

Draw a grid of intersecting lines on the plywood back. Cut lumber to fit the lines on your grid. When two lines intersect, cut or carve halfway through the depth of the front piece of wood, and halfway through the depth of the back piece of wood, so the shelf pieces fit together.

Once these boards are cut to fit into the square frame, repeat the process, measuring and cutting the boards that will be set perpendicularly. Dry fit everything on the ground. Keep things together with a strap on the outside.

Assemble the shelves on the ground with screws and tools. Place all the diagonal panels inside without glue. Adjust where needed, and use clamps to make everything fit. Measure the diagonal opposite corners to ensure that everything is square. Secure using three 2˝ screws per joint; predrill and countersink.

Secure the shelves within bookshelf frame, and attach the plywood back. Finish the project using a sanding block with 220 grit sandpaper. First, sand the sides, then the front of the top and bottom pieces. Then, do all front edges. Next, paint the wood with a small roller to avoid drips.

Use a stud finder to help anchor the bookshelf to the wall.