The winner was Black Man by Richard Morgan but, it seems, the American publishers to be politically correct decided to change the name to Thirteen for the US edition. As Martin Lewis who reviews the book on the Strange Horizons website points out there is a certain irony about renaming a novel about identity politics in this way.
I thought this account of the Morgan's starting point for the book very interesting :
Not long after the 2004 presidential elections in the United States a map started to do the rounds on the internet. It was a map of Jesusland, a reimaging of the borders of the U.S. predicated on the Red State/Blue State idea that the country was actually two distinct entities: a liberal, progressive one more akin to Canada clustered around the West Coast and the North East; and an intolerant, conservative one in the heartland and the South. It caught Morgan's eye and in Black Man he has made the concept a reality. The map itself is a facile piece of propaganda borne out of understandable frustration at the reelection of George W. Bush, but Morgan uses it as a starting point for an examination of whether there really is a war for civilisation; not the spurious one between the West and Islam so beloved of professional punditry but the far more compelling intrasocietal one between conflicting conceptions of the morally just life ...It sounds an intelligent and hard hitting novel.
Also worth reading is Adam Whitehead's reviews the book on his blog The Wertzone.
This is Richard Morgan's fifth novel, and you can find out more about him on his website.