2nd book in the new middle grade fiction series, Tristan Hunt and the Sea Guardians. After thwarting the dastardly plans of J.P. Rickerton, Tristan Hunt is having trouble keeping his newfound talents a secret. And if undercover spies and a mysterious illness threatening to expose the secrets of camp weren't enough, reports of dying fish and disappearing sponge in the Caribbean call Tristan and his friends back into action.