This is the completed library built in shelf project that I have been working on for a while now. The cabinet bottoms are pre-built from Lowes with spacers in between to give it a custom built in look. Baseboard and crown molding was also included for built in look. The shelves were built with 3/4 inch birch Plywood and 1x2 Poplar for the fronts.
Video Tutorial: https://youtu.be/XsW8huORLkQ