"Book fans" refers to people who really enjoy reading and are enthusiastic about books. They may have a strong interest in different genres or authors, and often spend a lot of time reading, talking about, and collecting books. Full definition
There are comic book fans who'll dig the comic series who aren't big gamers, necessarily. (pressthebuttons.com)
Instead, it tells a much smaller story starring characters that comic book fans know and love, but characters who might be new for the general audience. (cbr.com)
Either way, these are leaving comic book fans with some mostly mixed reactions. (themarysue.com)