The Anderson Twins: The Secret of Morning Star Ranch

Three months after Mystery on a Cruise Ship, Shelby and Daniel go to the Morning Star Ranch to visit their friends from the secret room. While they are there, mysterious things begin to happen. Before long, they find out there is a treasure buried somewhere on the ranch and someone is trying to scare the family off their property. Can Shelby and Daniel figure out who is behind the mysterious things happening around the ranch? Can they find the buried treasure before it's too late?