Detective Comics (1937)

Detective Comics #31, DC, September 1939 No debut on this one, and it still belongs: Bob Kane's giant Batman looming over a mountaintop castle under a full moon is the cover that made the character feel gothic rather than pulp. The issue added the Batplane and the Batarang and pitted him against the Monk. Of all the early Batman covers, this is the one that reads as a mood rather than an action scene.