Rising Tide

"Ben Gold has sacrificed his ship to prevent an attack on the hidden island city of Tamoanchan. He and Miranda, the scientist he loves, evade pirates and rescue some old scientist friends of Miranda's. But when a strange new disease starts affecting people on the island, it seems there's something sinister afoot. Miranda develops a test for the original virus that turned the population of most of North America into little more than beasts called Ferals two generations ago, but it proves ineffective against the new …