DIY BookShelf

While looking around the house this morning, we not only need some book shelves but also some rain barrels.  So i looked around and saw this on Apartment Therapy.. and thought to myself .. that this is a very good idea.. just by using some L-bracket.  The brackets will show.. but this is not only a cheap way to go.. but definitely different.. and kinda simple but bold… at the same time.  What do you think..?? i could use this L-bracket .. just about any corner i want.