The Clue in the Crossword Cipher
The Clue in the Crossword Cipher
Book 44 of Nancy Drew Mystery Stories
Description:
Nancy, Bess and George are invited to Peru to help a friend solve a "monkey mystery," which promises to lead to a fabulous treasure. The clue is an old crossword cipher carved on a wooden plaque. The quest to decode the crossword leads the girls to the Incan ruins at Cuzco and Machu Picchu.