Too Much Of A Good Thing

My personal library renaissance is going swimmingly, thanks for asking.  I finished Garth Nix's Abhorsen today, and I'll do a review ASAP, because it was just ripping good. 

But right now I wanted to pose a question to anyone who might be out there.  I have noticed (it's hard to miss) that I read mostly young adult and fantasy novels.  Really, if you count the overlap, almost exclusively.  I don't mind that, but I would like to think that I'm getting a slightly broader scope.  So: what plain old books--no category--should I read next?  I don't have a lot on my immediate list.  I've got a few things tucked away--Case Histories, by Kate Atkinson, The River King, by Alice Hoffman, The Bomber, by someone Swedish.  Does Margaret Atwood's Oryx and Crake count as science fiction?  It's always hard to tell when a mainstream author writes something with a genre-type plot.

So, candidates?  What historical fiction, literary fiction, women's fiction, fiction-fiction have I been missing?