The Poison Song (The Winnowing Flame Trilogy, #3)

The great wall of Ebora is crumbling. Wolves walk streets that once shone with gold, and Ebora's people - diseased and inhuman - are fading into nothing. Tormalin the Oathless, last son of Ebora, has had enough. Better to enjoy the pleasures of wine and coin, the pursuit of men and women, than to waste away under the blind gaze of a long-dead god. Talk about a guilt trip. When the eccentric explorer Lady de Grazon offers him employment, he foresees an easy life escorting a rich old woman from one side of Sarn to the other. But things do not work out quite that easily for Tormalin.