Submarine Jim

The Shark they Hunted had a Map inside . . .
Miles the Mutineer is trying to stay out of trouble, and when a gang of convicts track a mad shark-hunter to his door, he can't help shying away . . . until the shark they find proves to be hiding a map to the largest treasure in the South Seas. Taking a bag of sea-darts and a shark-whistle, Miles joins an old pirate buddy in the treasure hunt through a network of sunken ships, where the key to survival may be joining their enemies. But will joining the shark-hunters mean encountering greater dangers than cut-throat convicts? Will it mean fighting the sea beast that guards the ancient treasure?