This is an interesting question that colleagues and I have been pondering.
There are many ways to organize books. There are many labels that one can put at the top of the booklist. "Books for Boys", "Multicultural Fiction", "Chicklit", "Mysteries"...you know the drill.
Why is it that we never see "Books About Class"? Class meaning socioeconomic circumstances, in this case. Fiction, especially.
Because the books are out there...we just never stick them on a list to allow others to find them en masse.