Join Nancy Clancy in New York Times bestselling team Jane O'Connor and Robin Preiss Glasser's fourth Nancy Clancy chapter book! In this perfect follow-up to Super Sleuth, Secret Admirer, and Sees the Future, Nancy and her best friend, Bree, must go back in time to solve a mystery. Nancy and Bree set out to unlock the secret of the silver key in the hopes of finding some treasure along the way. But solving the mystery soon proves to be more difficult than they had thought, and when the answer isn't what they expect, Nancy and Bree learn there are some things that remain timeless forever. Fans of Fancy Nancy will love joining Nancy Clancy in the latest edition to the chapter book series. The central theme of all the Nancy Clancy books shines through, showing the power of positive thinking and the will to never give up.