This is an amazingly well-done series of books, reprinting the Dailies from 1939-1942 and the Sundays from 1939-1943.
Superman and Action Comics Archive Editions
DC Comics has been publishing hardcover archive versions of the original Superman and Action comics. A new series, entitled "Superman Chronicles" has begun reprinting these two series in chronological order in a single paperback title.
World's Finest Archive Editions
In the World's Finest comics, Superman teamed up with Batman. DC has reprinted these in hardcover archive format.
Supergirl Archive Editions
DC has separated the Supergirl stories out of the Superman comics for her own separate line.
Superboy Archive Edition
While the Superboy comic series hasn't been archived, his adventures with the Legion of Superheroes has.
Justice League of America Archive Editions
Superman also costarred in the Justice League of America comicbook series.