The Clue in the Crossword CipherBook - 1967
Nancy travels to Peru to help her friend Carla solve the "monkey mystery" and recover a priceless relic on which a crosword cipher is carved." -- back cover.
Publisher: New York, Grosset & Dunlap  (2004 printing).
Branch Call Number: J Keen
Characteristics: 177 p. 20 cm.