Underwater Passage

A Samurai sword, World War II pistol, silver and gold from Japanese conquests in the Pacific were in Papua New Guinea for the finding.
Wil Bolton leads a group of treasure hunters into the Pacific Island nation battling the elements, surviving the animals that rule the jungles and waters, and escaping their own friends in an effort to find another treasure in Book 2 of the Treasure in Paradise series --- Underwater Passage.