Seigel and Shuster's Superman character." ^ Daniels (1995), p. 64. ^ Grayling, A C. " The Philosophy of Superman: A Short Course " (Fee required), The Spectator , Press Holdings, July 8 , 2006 . ISSN 0038-6952 . Retrieved on 2007 - 01-29 . ^ Jules Feiffer The Great Comic Book Heroes