Bookcase is made of solid yellow pine (except the back panel which is plywood). No glue or hardware is used in the assembly. I like things to be structurally sound with no unnecessary parts. All joints are sliding dovetails. Parts are interlocking such that the bookcase can be assembled only in a particular order. Back panel sits in a groove around entire perimeter. The only way to disassemble is to slide the back panel up ¼ in (the groove in the top has extra depth), this unlocks the lowest shelf and it can be removed. After this the back panel slides all the way down and out. Then goes the rest. There are extra grooves for the second shelf to be installed higher or lower. Entire construction came out very sturdy. I rubbed joints with candle wax for easy assembly. The finish is clear polyurethane. Measures 4ft high, 3ft wide 12in deep.