American comic book Kane and Bill Finger created Batman, who debuted in "Detective Comics" #27 (1939). The period from the late 1930s through roughly the end of the 1940s is referred to by comic book experts as the Golden Age of comic books. It featured extremely large print-runs, with "Action Comics" and "Captain Marvel" selling over half a million copies a month each; comics provided very popular cheap entertainment during World War II especially among soldiers, but with erratic quality in stories, art, and printing. In the early 1940s over 90 percent of girls and boys from seven to seventeen read comic books.
Gil Kane "Earth's Other Green Lantern!" in issue #59 (March 1968). Kane similarly co-created an updated version of the Atom with writer Gardner Fox. Kane — who by 1960 was living in Jericho, New York, on Long Island — also drew the youthful superhero team the Teen Titans, a revival of Plastic Man, and, in the late 1960s, such short-lived titles as "Hawk and Dove" and the licensed-character comic "Captain Action", based on the action figure. Kane and Marv Wolfman created an origin for Wonder Girl in "Teen Titans" #22 (July–Aug. 1969) which introduced the character's new costume. He briefly freelanced some