About the book: 1999 / What could be more exciting than searching for treasures hidden centuries ago, if you also know that they rightfully belong to your family ? Penny and her cousin John find themselves in the hands of ancient maps and “tips” on where and how to look for treasures. But they are not the only ones trying to solve the mystery of the pirates and the Jolly Dolphin Hotel. The guys have insidious, cunning and cruel competitors. That's when young detectives from the Lone Pine Club come to the aid of brother and sister..