This is book number 5 in the Outer Banks Murder series.
With President Ronald Stamp and Kim Jung Ill threatening each other and the world with nuclear war, Joel Thomas and his college roommates head to the Outer Banks' primitive Portsmouth Island for a week of camping on the edge of the ocean. The possibility of romance develops when they meet Holly and her friends from WVU. Joel and Holly become acquainted with Elsa Newland, a preteen with uncanny abilities. She claims that a treasure chest buried on the island contains an object that has the power to establish world peace. Reverend Noah Swagger considers Elsa's vision absurd. He and his disciples believe the escalating conflict between North Korea and the United States will usher in the end times. However, when Elsa and her grandfather uncover four chests of gold coins, Swagger believes the treasure could be the answer to his prayers--funds for an underground bunker and enough supplies to sustain his church through a nuclear winter. Elsa is determined to find the legendary fifth chest. Will its mysterious contents have the power to prevent the impending Apocalypse? Others, though, have more malevolent plans to get their hands on the Legendary Treasure of El Salvador.