How to Build an Adjustable-shelf Bookcase

Cut the top (B) to size. Join it to the end of one side (A) with glue and #8x1-1/2-inch flathead wood screws in counterbored holes, with parts lying on the table as shown. Add the second side.

Cut the bottom (B) to size. With the sides/top assembly in place, clamp and glue the bottom to the sides. Check for square by measuring diagonally. Fasten with #8x1-1/2-inch flathead wood screws.

Rip and trim the base rail (C) and the end rails (D) to size. On a table, join the base rail to the end rails with glue. Secure with #8x1-1/2-inch flathead wood screws in counterbored holes.

Trim the side panels (E) to size. Glue and clamp one panel to the side (A) of the carcase flush with the front edge. Glue and clamp the second side panel to the other side. Let the glue dry, then glue and clamp the base/end rails (C, D) in place.

To profile the top molding, rip 3/4-inch oak to 1 inch wide. Use a tablesaw or router to cut a 1/16x1/16-inch rabbet on one edge.

With a roundover bit in a router, shape a 1/4-inch roundover 1/8 inch deep on the edge opposite the rabbet.

To complete the profile, chuck a 1/8-inch roundover bit into the router and shape a 1/8-inch roundover along the bottom edge.