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.
Paul Dini
Dini and Bruce Timm introduced Harley Quinn in "" as her first appearance was the episode "Joker's Favor" and in 1994, they adapted the character into comics in "" one-shot. Harley Quinn was integrated into the mainstream DC Comics continuity in the "Batman: Harley Quinn" one-shot published in 1999. Dini has written several comics stories for DC Comics, including an oversized graphic novel series illustrated by painter Alex Ross featuring Superman, Batman, Captain Marvel, Wonder Woman, and the Justice League. A hardcover collection of the Dini and Ross stories was published in 2005 under the title "The World's Greatest Super-Heroes".