SynopsisLovely young Carla Ponce, who lives in Peru, invites Nancy and her friends Bess and George to visit her and solve her "monkey mystery," which promises to lead to a fabulous treasure. A clue is carved on an intriguing wooden plaque that is so old, most of the crossword cipher is obliterated. When a notorious gang headed by El Gato (the Cat) steals the priceless relic, Nancy's hopes of solving the mystery are almost shattered. But the daring young detective's ability to think fast and act quickly results in the recovery of the plaque. Nancy's determined efforts to decode the crossword decipher take her to the magnificent, awe-inspiring Incan ruins at Cuzco and Machu Pichu. Through clever deductions, perseverance, and dangerous adventures, Nancy and her friends help to capture a ring of vicious smugglers and go on to make an astounding archaeological discovery., For cliff-hanging suspense and thrilling action read THE NANCY DREW MYSTERY STORIES®-the world's most popular mystery series for young readers! Millions of fans have matched wits with Nancy Drew, helping her solve more than fifty baffling cases-from THE SECRET OF THE OLD CLOCK to the haunting mystery of THE THIRTEENTH PEARL. Join the fun! Start your collection of original hardcover Nancy Drew® Mysteries today! #1 The Secret of the Old Clock, #2 The Hidden Staircase, #3 The Bungalow Mystery, #4 The Mystery at Lilac Inn, #5 The Secret of Shadow Ranch, #6 The Secret of Red Gate Farm 50 additional titles in hardcover! See complete listing inside.