The World's Bellybutton

William travels to a Greek isle to meet his long-lost father. There he meets a talking swan, who is really Zeus, king of the gods - and he desperately needs William's help. The knot that ties the world together is slipping, and the planet is about to explode. Can they trick the Gorgons and retie the knot before it is too late? Written by Tanya Landman.