By Andrew A. Smith Scripps Howard News Service Aug. 18, 2009 -- Occasionally I recommend a book without pictures, and such is the case with Brian Cronin’s Was Superman a Spy? And Other Comic Book Legends Revealed! (Plume, $14). Cronin began writing an online column in 2005 exploring the myths and legends surrounding comic books. I’ve been reading it off and on, because as a newspaperman I can s…