Comic book
Since the middle 20th century many comic books are about superheroes, but many others are about other things.  DC and Marvel comic books introduced Superman, Batman, Wonder Woman, the Flash, Justice League, Teen Titans, Spider-Man, the Incredible Hulk, the X-Men, Iron Man, Captain America, Thor, the Avengers and the Fantastic Four.  Very often, characters in books, video games, movies and television appear in comics, and sometimes comic book characters are used in movies, TV shows or video games.