A Fox Called Sorrow (Legend of Little Fur Series) Unabridged edition

The fate of the elf troll, Little Fur, becomes entangled with the mysterious fox, Sorrow, who longs only for death. Together they must travel to Underth, the troll king's underground city, on a dangerous quest to uncover his evil plans. The wise Sett Owl has foreseen that the future of the earth spirit, and perhaps all living things, depends on the success of this quest. Led by a greedy, devious rat, how can they succeed? But how can they fail, when so much is at stake?