The Mystery of the Lost Mine

Henry, Jessie, Violet, and Benny use to live alone in a boxcar. Now they have a home with their grandfather and they're going on a trip to the Arizona desert. There the Aldens learn about the legend of the Lost Dutchman Mine. Everything thinks the mine is filled with gold. Can the Aldens find out if the legend is true, and if it is, who will find the gold?