These are the guys (D.C. aka Detective Comics) that started it all. After the first Detective Comics issue back in 1937, they created and launched the first appearance of the Batman a short 27 issues later (May 1939). This was less than a year after the same publisher launched Superman in Action Comics #1 June 1938. And there you have it, the beginning of a cultural phenomena.
My copy of Detective Comics #44 is from October 1940. It’s my personal favorite “post-Robin” cover. It contains Bob Kane cover art (co-creator of Batman with writer Bill Finger) and as a bonus, inside story featuring superhero The Crimson Avenger. I also own my second favorite post Robin cover, Detective Comics #54 (August 1941). It’s a doppelganger for the famed Issue #33 (November 1939).
Detective Comics #151 also quickly become a favorite in my collection. After all it has a combination of the Batman riding in a sidecar motorcycle driven by an enchanting blonde – everything I like in a comic rolled all into one! True, this issue (by artist Jim Mooney as ghost artist for Batman creator Bob Kane) came out ten years later (July 1949) but still the near the peak of the superhero comic book era.