This is what I give you. A rough plan, one of my very first, of one of my very favorite pieces. Something about being tall and slim, but functional, with shelving at eye height, makes this particular sized bookshef an instant favorite. I've made more than a few of this design . . . but NONE of them looked like this . . . And this is what you build!
3 - 1x12 Boards 8' Long
1 - 1x4 Scrap, 24" Long
5 - 1x2 Boards, 8' Long
4 - 1x3 Boards, 8' Long
2 - 1x12 @ 68" (sides)
5 - 1x12 @ 22 1/2" (bottom and shelves)
1 - 1x12 @ 24" (top)
1 - 1x4 @ 24" (top header)
2 - 1x2 @ 68 1/2" (front legs)
4 - 1x3 @ 72" (side legs)
2 - 1x2 @ 72" (back legs)
4 - 1x3 @ 8 1/4" (side trim for top and bottom)
1 - 1x2 @ 21" (front bottom trim)
back, optional 1/4" plywood or mdf or other sheet goods, 72" x 24", measure and cut to fit back.
4 - 1x2 @ 13" (side crown pieces, top and bottom)
1 - 1x2 @ 27" (bottom crown piece, front)
1 - 1x2 @ 28 1/2" (top crown piece, front)
Box. We begin by "building the box" - as I call it. Notice how the bottom is inset and the top piece sits on top of the side pieces.
2. Shelves. You can choose to build the shelves in, as shown above, or skip this step and put the shelves in later with shelf brackets (this makes your shelves adjustable).
Header. Add the header piece as shown, keeping the top and side edges flush.
Side Legs. Now add the legs as shown above. Notice how the 1x2s go on the front and back, and the 1x3s go on the sides. Keep all edges flush. Nail each piece to the main box, and also nail the 1x2s and 1x3 together.
Crown. Add the crown as shown above. First attatch the side pieces, then the front pieces. I like to cut my crown as I go to ensure the most accurate fit.