TY - BOOK AU - CAROLYN KEENE TI - The clue of the black keys SN - 978-0-448-09528-8 PY - 1996/// CY - New York PB - Grosset & Dunlap KW - The Power of Hidden Truths KW - Perseverance Against Obstacles N2 - Nancy Drew mystery book where Nancy assists archaeologist Terry Scott in locating a missing professor (Dr. Pitt) and a buried treasure in Mexico ER -