Marvel Comics stars of "The Fantastic Four" #1 (Nov. 1961), broke convention with other comic book archetypes of the time by squabbling, holding grudges both deep and petty, and eschewing anonymity or secret identities in favor of celebrity status. Subsequently, Marvel comics developed a reputation for focusing on characterization and adult issues to a greater extent than most superhero comics before them, a quality which the new generation of older readers appreciated. This applied to "The Amazing Spider-Man" title in particular, which turned out to be Marvel's most successful book. Its young hero suffered from self-doubt and mundane problems like any other
Marvel Comics of money with their 1980s children's comics imprint Star Comics and they earned a great deal more money and worldwide success during the comic book boom of the early 1990s, launching the successful 2099 line of comics set in the future ("Spider-Man 2099", etc.) and the creatively daring though commercially unsuccessful Razorline imprint of superhero comics created by novelist and filmmaker Clive Barker. In 1990, Marvel began selling Marvel Universe Cards with trading card maker SkyBox International. These were collectible trading cards that featured the characters and events of the Marvel Universe. The 1990s saw the rise of variant covers,