"I knew it wouldn't be long before Nancy would become involved with some enigma. This one sounds like a real challenge." p.8Nancy travels to Peru to solve a 300 year old mystery. Invited a new friends, Nancy, Bess and George set out to solve a dangerous mystery which leads them through parts of South America where they also learn about the ancient cultures of South America.
This was a fairly interesting mystery. There was a lot of history and it was something different from the standard European country mystery. I still want to know why George and Bess' parents let them wander around the world so much. Though I guess I would want those opportunities for my child too. There were several harrowing close calls but, of course, Nancy Drew comes through them just fine.