That's what I call a Monkey Mystery! When a mysterious crossword puzzle offers mystery, treasure, and a free trip to Peru, Nancy and the gang know what to do. Summoning all the bravery it takes to go back to the hotel room alone, George, Bess, and Nancy face off against the criminal known as "El Gato" at every turn. Can Nancy solve the mystery of reading small words before El Gato pretends to be an authority figure for a third time? Or will the treasure of the one friendly conquistador never be returned to whoever it belongs to? Join us as we ask- Could the pictures in the Nascan Lines look smaller if they were further away?