Superman the offer. Siegel and Shuster submitted their work in late February and were paid $130 (AFI $) for those 13 pages. In early March they signed a contract (at Liebowitz's request) in which they released the copyright for Superman to Detective Comics, Inc. This was normal practice in the business, and Siegel and Shuster had given away the copyrights to their previous works as well. Superman was finally published on April 18, 1938, in the first issue of "Action Comics". The magazine sold very well, and feedback from readers showed it was because of Superman. Siegel and Shuster read pulp
Origin of Superman time in "Superman" #61. "Action Comics" #158 retold the origin again, this time acknowledging the adventures of Superboy. After Mort Weisinger took over as editor of the Superboy comics in 1953, the mythology of Superman began growing, starting with the introduction of Superboy's pet Krypto the Superdog, the first survivor of Krypton in comics other than Kal-El himself. When Weisinger became editor of the entire Superman line in 1958, the Superman mythology began expanding even more rapidly. Producing over a hundred Superman stories a year, Weisinger aimed to introduce a new element to the character's mythology every six months. By