Pick up truck tonneau cover with tailgate storage

A fold up tonneau cover for covering a pickup cargo box wherein the cargo box is an open topped space defined by two spaced-apart, generally vertical, and generally parallel to each other sidewalls, a generally vertical tailgate at a rear end of and at a right angle to the sidewalls, and a generally vertical wall adjacent to a passenger cabin, generally at a right angle to the sidewalls, and at an opposite end of the sidewalls from the tailgate;

• the tonneau cover comprising:
• an end to end side series of substantially rigid and generally rectangular main section panels of a width spanning the distance between said cargo box sidewalls, with adjacent main section panels in said series interconnected so as to allow a first main section panel to be swung up and down onto the next main section panel to be stacked together, and said stacked first and next main section panels able to be swung up and down onto the next main section panel to be stacked together with said three stacked section panels then able to be swung up and down onto a next main section panel to be stacked thereon, and so on until all of said main section panels are stacked together.