1) Driller, Drill bids, Sand Papers, washers
2) Wood - Softwood from Home Depot
3) Metal Bookshelf holders (EKBY BJÄRNUM Bracket - 11)
4) Parachute cord
For a more elaborate detail of the entire build process please read the following blog- http://hareen.quora.com/Carpentering-A-Bookshelf
Step 1: Cutting the Wood Pieces
Cut the long strips of wood into 12 smaller bridge-pieces, 7.5 inches in length. (Takes around an hour worth of effort).
TIP: Since we'll eventually be using a hand-held drilling machine, it is advised to cut some additional spare pieces, as it is difficult to get the holes parallel to the top surface of the bridge piece.
Step 2: Drill Holes
Drill two hole, 1 inch away from the edge, side-to-side along the width of the bridge-piece.
Step 3: Step 3: Polish the Edges
Use a sandpaper to polish the edges of the bridge-piece.
Step 4: Step 4: Tie Up
Take a parachute cord and insert one bridge piece at a time with washers between them. Tie a knot on both the edges and finish the cord with a flame using the instructions below.
Step 5: Step 5: Fit the Edge Brackets
Fit the edge brackets (See materials in the introduction) to the bridge-pieces on the edge. Your bookshelf is ready now.