Morgawr (The Voyage of the Jerle Shannara, Book 3)

Harrowing confrontations with the merciless Ilse Witch and the monstrous Antrax have already taken their toil on the intrepid heroes of the Four Lands. But their darkest adversary now snaps at their heels, in the form of the Morgawr - master of the Ilse Witch, feeder upon the souls of his enemies, and centuries-old sorcerer of unimaginable might.
With a fleet of airships and a crew of walking dead men at his command, the Morgawr is in relentless pursuit of the Jerle Shannara and the crew that mans her. For the Morgawr, the goal is twofold: to find and control the fabled ancient books of magic and to destroy the dark disciple who betrayed him - the Ilse Witch. But the Ilse Witch is already a prisoner...of herself. Exposed to the awesome power of the Sword of Shannara, and forced to confront the truth of her horrifying deeds, she has fled deep into her own mind. Now at the mercy of those who seek vengeance against her, her only protector is her long-lost brother, Bek Ohmsford, who is determined to redeem his beloved sister...and deliver her to the destiny predicted for her by the Druid Walker Boh.