A good book to get for early Superman is SUPERMAN: THE DAILIES 1939 - 1942. It was priced low, but it might be out of print now. It has a lot more pages than your average Archive. The art is in black and white, but I think the dailies were some of the best work from Superman's early years. Joe Shuster and the top artists in the Shuster studio, like Wayne Boring--plus Jack Burnley--did all the art; while Jerry Siegel wrote all the stories. The daily continuity allows Siegel to tell much longer stories, with development of supporting characters. Given this was for the newspaper syndicate, whch had a higher readership than the comic books, Siegel and Shuster were putting their best work into these. There's also SUPERMAN: SUNDAY CLASSICS 1939 - 1943--less pages, but in color; however, the dailies have better stories than the Sundays, in my opinion.