#13.17

Sure. You know what I think this is also a function of though? Dean saying things like, "Dude, could you be any more gay?" in 3.05 because Sam remembers the story of Cinderella. Actively supporting a narrative that he does not like reading or at least certain types of books (I actually think maybe Dean isn't a huge fan of classic fairy tales for various reasons but I digress). Also Dean often frames Sam as the researcher and himself as the do-er. Even in season 1, where Dean's competence at hunting alone (both the researching side and the actual killing part) is very evident, in Scarecrow, he jokes, "I’m actually on my way to a local community college. I’ve got an appointment with a professor. You know, since I don’t have my trusty sidekick geek boy to do all the research." He allows this narrative of himself versus Sam to persist, except when he doesn't and goes, "What? I read" ("Baby" is one example). (Really he just likes keeping Sam on his toes and constantly turning the tables to remind him that there are things he does not know jhvdshggvzhsdvhsa.)

Dean seems to be an avid reader of fiction and he extensively incorporates his consumption of media (watched, read) into pop culture references throughout the series. He loves a good story. He is also an extremely competent researcher when he wants to be... but there are also suggestions that Dean most of the time doesn't particularly enjoy the research grind. Sam? Well—he does seem to have a fondness for fairy tales specifically, but he's that nerd who looks at a call number from the Library of Congress and goes, "This references sciences and probably birds specifically". Also the kind of nerd who would probably work up a whole reference system for the bunker library, which I think Dean would do if he had to--but he wouldn't enjoy doing it and I think Sam is the kind of person who would actively enjoy doing that.

Dean's relationship to research comes across very ADHD to me personally in the mid to late series. Like he can suddenly be sitting for hours doing research if that is what he NEEDS to be doing in that moment and there's some real urgency to that need. But most of the time I think looking through tomes for hours and hours searching for an obscure spell is not what he would like to be doing, and Sam kind of enjoys that shit. I also think perhaps Sam has trouble understanding the difference between the two ways he and Dean relate to books and how both of them like reading but for different reasons, and that not enjoying what he enjoys about research does not mean you don't enjoy reading books generally. But Dean also contributes to this narrative of "Sam is the researcher, and I do not like books", like in 13.17 (because they are about to spend hours and hours researching) saying very sarcastically, "I love books!"