Gerald Vizenor (http://en.wikipedia.org/wiki/Gerald_Vizenor)'s The Heirs of Columbus (http://www.amazon.com/Heirs-Columbus-Gerald-Vizenor/dp/0819562491) is a hard book to categorize, but it needs to be rec'd and I'm going to put it in this category.

It's a difficult and funny novel, blending the trickster tradition with postmodernism. I loved it.