I quite enjoyed the concept of the dark inversion of the King Arthur myth. It was a good choice to have the viewpoint character be a sort of 'herald' figure as opposed to one of the Voices or the king himself, as it let the reader follow the revelations organically. The prose got a little snarled at times but the story kept moving at a good pace and (at least I found it to be) easy to track with. You've got a good twist on the traditional understanding of the knightly kingdom and the forces of Havoc here too, and I'd love to dig further into this conception of the setting.