For some reason, the cover to this 1971 comic book, which I once possessed, sticks in my mind. The issue was a collection of reprints, as I recall, but it was the wrap-around cover, with two Supermen, Batmen, Robins, Flashes, Green Lanterns, Atoms, Hawkmen, and Wonder Women--from Earth-1 and Earth-2, of course, as any well-read aficionado could explain--that made this so cool. Oh, the stuff that has accumulated in my head!
