What DC Comic book did the Joker originally appear in 1940?
Joker (character) The Joker is a fictional supervillain created by Bill Finger, Bob Kane, and Jerry Robinson who first appeared in the debut issue of the comic book "Batman" (April 25, 1940), published by DC Comics. Credit for the Joker's creation is disputed; Kane and Robinson claimed responsibility for the Joker's design, while acknowledging Finger's writing contribution. Although the Joker was planned to be killed off during his initial appearance, he was spared by editorial intervention, allowing the character to endure as the archenemy of the superhero Batman.
World's Finest Comics World's Finest Comics was an American comic book series published by DC Comics from 1941 to 1986. The series was initially titled "World's Best Comics" for its first issue; issue #2 (Summer 1941) switched to the more familiar name. Michael E. Uslan has speculated that this was because DC received a cease and desist letter from Better Publications, Inc., who had been publishing a comic book entitled "Best Comics" since November 1939. Virtually every issue featured DC's two leading superheroes, Superman and Batman, with the earliest issues also featuring Batman's sidekick, Robin.