Plans for cheap bookshelves

A simple diagram detailing how to make a system of shelves out of scrap wood and cinderblocks. Very boho-chic.
It tells you how to make a set of cinderblock bookshelves with the following components:
 4 - piles of scrap wood 
 10 - cinder blocks 
You realize you could make this without needing a workbench.
Making this would take some familiarity with craft.
==Components==
*Piles of scrap wood
*Cinder blocks