Modular Book Shelf

This design was inspired by my brother.  He wanted a book shelf the could be stackable and that could be taken apart for transport in such a way as to allow for the owner to keep the books in the shelf for transport.  The foot and top of the shelf are built separate of the individual shelves themselves.  This design includes a key "I" notch on the top and bottom of both sides to allow a "key" to be made that can lock the shelf together to prohibit the shelves from trying to come apart.