Batman
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. Batman proved a hit character, and he received his own solo title in 1940 while continuing to star in "Detective Comics". By that time, Detective Comics 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. Creators including Jerry Robinson and Dick Sprang also worked on the strips during this period.
Batmobile
Batman is shown driving a red-colored car in "Detective Comics" #27, the first Batman story. However, this car was never mentioned by name as the Batmobile, and the concept of a red car was abandoned in subsequent stories. Although the Batplane was introduced in "Detective Comics" #31, the name "Batmobile" was not applied to Batman's automobile until "Detective Comics" #48 (February 1941). The car's design gradually evolved in early Batman stories. It became a "specially built high-powered auto" by "Detective Comics" #30, and in "Batman" #5 (March 1941), it featured a bat hood ornament and a darker exterior color. Eventually, the predominant designs included a large, dark-colored body and bat-like accessories, including large tailfins scalloped to resemble a bat's wings.