Keene, Carolyn.

Summary: 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.

Format: text

Publisher / Publication Date: Grosset & Dunlap 1967

Copies Available at Woodmere

1 available in Juvenile Fiction Series, Call number: J FIC KEE