Midnight Tides (Malazan Book of the Fallen Series #5)

"After decades of warfare, the tribes of the Tiste Edur have at last united under the rule of the Warlock King. But peace has been exacted at a terrible price a pact made with a hidden power whose motives are at best suspect, at worst deadly. To the south, the expansionist kingdom of Lether has devoured all of its less-civilised neighbours with rapacious hunger. All save one the Tiste Edur. But Lether is approaching a long-prophesied renaissance from kingdom & lost colony to Empire reborn -