Below: a Classic Style Bookcase made from a lighter toned wood (maple or ash):
Below: a Lighter toned bookcase (maple or ash) with thicker shelves:
below: A lighter toned bookcase with even thicker shelves but thinner vertical sides. These shelves are recessed from the sides a little. (note that this bookcase is wider than 27 1/2”)
Below: A medium toned bookcase (white oak) with thicker shelves and sides
