Step 1: What's needed.
Shelves from the old bookshelf or you can get them from the local hardware store.
4 pvc pipe lengths. s/b under 2 bucks apiece.
Pvc ends would make it look nicer but not required.
at 4 sets of screws, washers, and bolts for each shelf.
Dril (a drill press would be better) with bits the size of the diameter of the pvc and for the screws.
C-Clamps (which I do not have).
Step 2: Preparation
Measure about 1/2 inc to an inch on each pipe and mark. This is where you want to drill you first holes.
Drill the four holes in the pvc for the bolts.
Put in a set of bolts, washers, and nuts for the first shelf..
Install the first shelf.
Now measure up 10 inches and repeat the process till all shelves are done.
If shelves are loose, you may want to add some king of back brace to the system.