 Final credit after the copyright notice is a quote from novelist  Harry Crews:   What I know is that all over the surface of the earth where humankind   exists men and women are resisting climbing the Tower.  All of us have a   Tower to climb.  Some are worse than others, but to deny that you have   your Tower to climb and that you must resist it or succomb to the   tempation to do it, to deny that is done at the peril of your heart and   mind.