The Lost Treasure of the Darién Gap, the Most Dangerous Jungle in the World!: Book IV of The Lost El Dorado Series - The Lost El Dorado Series, #4

Our friends on the PT boat are on a new adventure, but this time it will be the most dangerous journey of their lives! Dr. Jack Paris' daughter and three of her friends were invited to teach English to the children of Colon, Panama, but they have gone missing. Intel has told Jack and the crew of the PT boat that the teenage girls have been kidnapped and will be sold for slaves in Cartagena, Columbia.
But between them lies the Darién Gap - the most dangerous jungle in the world. The jungle is inhabited by drug runners, sex slavers, military men, mercenaries, jaguars, killer snakes and deadly spiders. The men who kidnapped the girls are military men, who are also looking for the lost gold mines of the Darien Gap, one of the richest strikes in Central America. Unfortunately, this lost treasure is protected by an ancient tribe of natives, sworn to protect the gold from all outsiders.
Only the PT boat and its crew can rescue the girls and get them out alive before everything comes to a deadly end!