Comic book collecting the popularity of superhero characters Superman, Batman, and Captain Marvel. Since the 1960s, two publishers have dominated the American comic book industry: Marvel Comics, publisher of such comics as "Spider-Man", "X-Men", and "Fantastic Four", and DC Comics, which publishes titles such as "Superman", "Batman", and "Wonder Woman". Other large non-manga publishers include Image Comics, IDW, and Dark Horse Comics. As comic books regained their popularity in the 1960s during the boom of the Silver Age, fans organized comic book conventions, where they could meet to discuss their favorite comics with each other and eventually with the creators themselves. , numerous
Superhero This era saw the debut of first known female superhero, writer-artist Fletcher Hanks's character Fantomah, an ageless ancient Egyptian woman in the modern day who could transform into a skull-faced creature with superpowers to fight evil; she debuted in Fiction House's "Jungle Comic" #2 (Feb. 1940), credited to the pseudonymous "Barclay Flagg". The Invisible Scarlet O'Neil, a non-costumed character who fought crime and wartime saboteurs using the superpower of invisibility created by Russell Stamm, would debut in the eponymous syndicated newspaper comic strip a few months later on June 3, 1940. One superpowered character was portrayed as an antiheroine, a