Prod. No.:
CAP_0113 Officially Licensed Batman Merchandise
Batman Full Back Metal Baseball Style Hat
The first Batman story, "The Case of the Chemical Syndicate," was published in Detective Comics #27 (May 1939).
Finger said, "Batman was originally written in the style of the pulps", and this influence was evident with Batman showing little remorse over killing or maiming criminals and was not above using firearms.
Batman proved a hit character, and he received his own solo title in 1940, while continuing to star in Detective Comics.
By that time, National was the top-selling and most influential publisher in the industry; Batman and the company's other major hero, Superman, were the cornerstones of the company's success.
The two characters were featured side-by-side as the stars of World's Finest Comics, which was originally titled World's Best Comics when it debuted in fall 1940.