That would be manga, comics, astronomy and any other random informational books.
*Rawrsor reads a quiet book about a rampaging serial killer
* Vacui Natale browses the shelves for a book
* Vacui Natale picks a random book and flips though the pages
* Vacui Natale stops on random page
* Vacui Natale takes out a Sharpie and draws a penis going into a vagina on random page
* Vacui Natale closes book and puts it back on shelf
* Vacui Natale slinks away unnoticed
* Shady makes sexy time with the librarian
* eKusoshisut0 takes a nap in the back of the library
Reads Hp7 And Waits for the damn movie
* Vacui Natale actually decides to read a book this time
* lembas pokes the sleeping eku
Give me 5 more minutes eh?
* eKusoshisut0 goes back to sleep
* lembas sits on the sleeping eku