Anyone out there in DCM land know of any good books with encyclopedic information on comic book villains from the Golden Age?
I just read The Legion of Regrettable Super Villains by Jon Morris, and while it was entertaining and similar to what I'm looking for - it deliberately focuses on the goofier villains from the period. I'm looking for similar books that: (a) Approach the subject matter just a bit more seriously, and (b) Don't focus exclusively on DC & Marvel (as we all know, there were a lot of other publishers cranking out interesting stuff at that time).
Thanks