Iron council / China Miéville.

Enhanced descriptions from Syndetics:

FollowingPerdido Street StationandThe Scar, acclaimed author China Miéville returns with his hugely anticipated Del Rey hardcover debut. With a fresh and fantastical band of characters, he carries us back to the decadent squalor of New Crobuzon--this time, decades later. It is a time of wars and revolutions, conflict and intrigue. New Crobuzon is being ripped apart from without and within. War with the shadowy city-state of Tesh and rioting on the streets at home are pushing the teeming city to the brink. A mysterious masked figure spurs strange rebellion, while treachery and violence incubate in unexpected places. In desperation, a small group of renegades escapes from the city and crosses strange and alien continents in the search for a lost hope. In the blood and violence of New Crobuzon's most dangerous hour, there are whispers. It is the time of the iron council. . . . The bold originality that broke Miéville out as a new force of the genre is here once more inIron Council: the voluminous, lyrical novel that is destined to seal his reputation as perhaps the edgiest mythmaker of the day.