Demon Lord of Karanda (The Malloreon #3) by David Eddings

IN THIS THIRS BOOK OF THE MALLOREON, GARION, BELGARATH AND THEIR FRIENDS FOLLOW THE QUEST BEGUN IN GUARDIANS OF THE WEST AND CONTINUED IN KING OF THE MURGOS. IT WILL LEAD THEM FURTHER INTO THE DARK DESIGNS OF ZANDRAMAS AND THE STRANGE WAYS OD DEMONS... 

The company now knows that Garion’s baby son has been kidnapped by Zandramas and is to be used in a terrible ritual which will make the Dark Destiny supreme. The group, however, has been detained by Zakath, Emperor of all Mallorea, and taken to Mal Zeth, the largest city in the world. 

When a dire plague strikes, they manage to escape and, as prophesied by the Seeress of Kell, travel on to Ashaba – but, although they find Uvron, mad disciple of the evil god Torak, and Demon Lord Nahaz, Zandramas is gone. In a desperate race against time, the company turned east once more to follow her spoor... 

THUS CONTINUES BOOK THREE OF THE MALLOREON