For a lot of people, a comic book is something made by Marvel or DC, maybe Spider-Man or Batman.
(Remember, before you berate us, though: Vertigo is part of DC.
And A History of Violence was published by Paradox Press, another DC imprint that has since been shuttered.
Even though Marvel and DC have been the perennial giants of the industry, there have always been other publishers, and other kinds of comics besides the superhero movies of “The Big Two.”