Plot summary
Somebody steals gold from the Wakefield Mint without even triggering the alarm. The Hardy Boys must track the gold down. Then the Early Art Museum is robbed of a gold artifact. Their main suspect is a man named Pedro Zemog, who ran out of the museum after the alarm was triggered. A strange note with Zemog's name on it sends them to Zurich, where somebody claims to know about the Wakefield gold theft. Then another note with Zemog's name on it sends the boys to Mexico City, where they discover a pyramid in the jungle. In the pyramid are many gold coins and sculptures. Afterward, the boys discover the gang's hideout and thwart the gang with their father Fenton's help.References
The Hardy Boys books 1977 American novels 1977 children's books Novels set in Mexico Grosset & Dunlap books {{1970s-ya-novel-stub