Gool is the sequel to ' Salt' - Sixteen years have passed since Pearl from Company and Hari from Blood Burrow defeated the tyrant Ottmar - Now their children, Xantee and Lo, face an even more dangerous foe - Hari lies dangerously ill with a fragment of a strange creature wrapped around his throat, draining his life - The beast is called gool, meaning Unbelonger - It is one of many, destroying the mountains and jungles of the world.