Alan Dean Foster 
Triumph of Souls 

Etjole Ehomba and his companions brave the Kraken haunted waters of the impassable Semordria. Then they must cross yet another continent in their search for the kidnapped Visioness — past berserk giants, skeleton armies, a desert prospected by Hell’s demon and at the end of the world waits Hymneth the Possessed: the sadistic necromancer of unspeakable horror. But Ehomba already knows the prophecy: His quest is doomed to failure, and Hymneth will kill him. Unless somehow, the simple herdsman can ask the questions that even Death must answer…