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
X-Men: Legacy the parent title "Uncanny X-Men", with co-writers Chris Claremont and Jim Lee, previously the penciler on "Uncanny", moving over to "X-Men", while studio mate Whilce Portacio took over penciling duties on "Uncanny". "X-Men" #1 is still the bestselling comic book of all time, with pre-order sales of over 8.1 million copies, according to Guinness Book of World Records, which presented honors to Claremont at the 2010 San Diego Comic-Con It is estimated that somewhere between 3–4 million copies were actually sold. The sales figures were generated in part by publishing the issue with five different variant covers, four of which