This is a mystery book. It is a longer story. In this book, the boxcar children went on a trip with Joe and Alice to find a lost person named Bill. In the end, they found out that Bill was the old hermit lived in a hut built by himself. He is a good man. His brother and brothers' friends tricked him into believing that his wife was died and place where he lived was burned by a fire. So Bill went to live in a hut and disguised as a hunter. I think the boxcar children are kind and love helping people.