Kingdoms of Light(2001)

Alan Dean Foster

The pastoral, once pristine kingdom of the Gowdlands lies crushed, conquered by the ghastly monsters of the Totumakk Horde and the diabolic Khaxan Mundurucu. A clan of sadistic goblin-warlocks who combine their powers to wield unimaginable necromancies, the Mundurucu have blasted the Gowdlands' most brilliant wizard into cinders and cursed the entire land with a vicious hex that no mortal can break. But the wizard's death unleashes his final enchantment, for his ashes hold a spell that transforms the mage's loyal pets--the cats Cezer, Cocoa, and Mamakitty, the dog, Oskar, the songbird Taj, and the immense boa Samm--into the world's last champions. Possessing human form, animal instincts, and uncanny magical talents, these six heroes must escape Mundurucu assassins, go somewhere into the rainbox, and bring back the pure White Light that alone can shatter the goblin hex. Their odyssey will pass through bizarre realms and weird dangers in the chromatic Kingdoms of Light. And finally, beyond the rainbow's end, they must somehow discover the real secret of their quest--and the true nature of a magic that can destroy their world forever . .