Wrath of a Mad God — Raymond E. Feist

The Darkwar rages, bringing bleak days of destruction and despair to Midkemia and Kelewan. To save both worlds, the powerful sorcerer Pug and select members of the mysterious Conclave of Shadows must journey deep into the dangerous realm of the bloodthirsty Dasati on an audacious mission that has little, if any, chance to succeed. In Midkemia, young warriors Tad and Zane and their fellow soldiers must protect the Kingdom from raiders. And Pug's beloved wife, Miranda, finds herself a prisoner of the Dasati and, even more ominously, of Pug's nemesis, the evil sorcerer Leso Varen.

But salvation may come from a friend thought long dead -- an unlikely ally whose remarkable powers will be sorely needed. For there is a momentous battle looming ... a final, fevered onslaught against the most malevolent agents of evil ever known.