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.
Dick Sprang
Continuing to seek comic-book work, Sprang submitted art samples to DC Comics editor Whitney Ellsworth, who assigned him a "Batman" story in 1941. Anticipating that Batman creator Bob Kane would be drafted to serve in World War II, DC inventoried Sprang's work to safeguard against delays. Sprang's first published Batman work was the Batman and Robin figures on the cover of "Batman" #18 (Aug.-Sept. 1943), reproduced from the art for page 13 of the later-published "Detective Comics" #84 (Feb. 1944). Sprang's first original published Batman work, and first interior-story work, appeared in "Batman" #19 (Oct.-Nov. 1943), for which he penciled and inked the cover and the first three Batman stories, and penciled the fourth Batman story, inked by Norm Fallon. Like all Batman artists of the time, Sprang went uncredited as a ghost artist for Kane.