I agree that Mystery is literature. There are some great mystery books that are so well-written, but I think a lot of people only read "mainstream" fiction so they never discover them!
I was reading in a local paper's "Best of Albuquerque" issue about the best writer in New Mexico. He is a mystery writer! They also featured some runners-up, and one other writer wrote mysteries, too. A lot of their mysteries were about New Mexico, which made me excited to read their books.
It's too bad that there isn't a Mystery forum, but feel free to post here about mysteries, because they are certainly included in Literary Fiction! -Anita