A rare edition of a comic in which Superman made his first ever appearance has sold for ... which sold for 10 cents when it was released in 1938, is the world's most valuable comic book.

Superman's first appearance in Action Comics #1 established the hero's origin, powers, and core values. Jerry Siegel and Joe Shuster's creation of Superman revolutionized the comic book industry ...

The precise era of the Golden Age is disputed, though most agree that it was born with the launch of Superman in 1938 ... of the very first issue. Though the superhero comics were the top sellers ...