I'm a DYI guy with a fair number of projects under my belt but I've been "circling" one involving the construction of a set of built in oak bookshelves. I envision two side by side shelf casings 36" x 96" (9" deep) on a common base. These casings would be much larger than anything I've built before so I'm trying to formulate a complete plan prior to the first cut (totally out of character). The assembly would be a glue up with the top and bottom 34-1/2 wide inside the sides. I'm thinking that the back of the casing would be plywood, the sides solid and that since my clamp inventory is somewhat limited I would assemble the casings in stages. First, butting the top and bottom (centered) to the back using corner clamps to square up and F style close the joint and then after the joints set up gluing the sides to the back, top and bottom one at a time, Corner clamps to hold square, F clamps between side and back and parallel clamps to close the joint between the top and bottom to each side. I might add that it would be difficult to construct these casings in my shop and then move them inside and up to the second floor so I'm planning on assembling them in the room in which they will be installed. I'd appreciate any thoughts or suggestions anyone might have on this. Should these joints be reinforced with nails?