Regional Books

I had a discussion with somebody last month about how regional colloquialisms are sort of merging or disappearing as social networking creates a place where language is developed on a national and global level. The other person thinks this is causing a lot of contemporary literature to have a sort of disembodied voice belonging to know one particular region.

I've been reading "A Confederacy of Dunces," which takes place in New Orleans. The author's dedication to capturing the regional dialect of New Orleans really flavors the book in a way I haven't seen in quite a while. I'm wondering if that's really possible to do in a 21st century novel.

So here's my super nerdy question: What is a book that truly captures the idiosyncrasies of a region? The more contemporary the better.

The last one I can think of is "Mystic River," which is set pretty distinctly in Boston.