The Jungle Pyramid

Brothers Frank and Joe Hardy are investigating a museum robbery in Mexico and stumble upon a jungle pyramid filled with perilous secrets. A million dollars’ worth of gold bullion has been stolen from the Wakefield Mint under strange circumstances. Mr. Hardy is asked to investigate but his life is soon threatened, leading him to ask Frank and Joe for help. The boys travel to Zurich, Switzerland in search of clues and a stolen ancient gold figurine. Despite challenges, they return to the United States to continue their investigation, which leads them to an adventure in the Yucatán jungle. As they encounter new doubts and suspicions, they realize their lives are in great danger.