From the back:
Sklar Hast lives in the Blue World. A water paradise of floating islands big enough to support houses and sea gardens and communication towers so the People of the Floats can wink messages to each other. All is harmony and perfection. Except for the sea monsters.
King Kragen is the ruler of the deep, a great beast who subdues others of his kind in exchange for certain things. Like food. And reverence. The submissive People of the Floats pay up, they know King Kragen is indestructible. Sklar Hast knows it too but he doesn’t care — he’s going to try and kill him anyway.