Shadow Prowler - Alexey Pehov

After centuries of calm, the Nameless One is stirring. An army is gathering: giants, ogres and other creatures joining forces from across the Desolate Lands, united for the first time in history under one black banner. By the spring, or perhaps sooner, the Nameless One and his forces will be at the walls of the great city of Avendoom.
Unless Shadow Harold, master thief, can find some way to stop them.
Epic fantasy at its best, Shadow Prowler is the first in a trilogy that follows professional thief Shadow Harold on his quest for a magic Horn that will restore peace to the kingdom of Siala. Accompanied by an elfin princess, ten Wild Hearts - the most experienced and dangerous royal fighters - and the King's court jester (who may be more than he seems ... or less), Harold must outwit angry demons, escape the clutches of a band of hired murderers, survive ten bloody skirmishes ... and reach the burial grounds before dark. Can he escape a fate worse than death?