Like the other books of the series, this tale's complete in itself. In The Rover Boys at School we were introduced to Dick, Tom, and Sam, and their amusing and thrilling adventures at Putnam Hall, a military academy for boys situated in the heart of Now York State; in "The Rover Boys on the Ocean "we followed our young heroes during a most daring rescue; and in "The Rover Boys in the jungle" we learn what true American courage can do, even in the heart of the Dark Continent. In the present tale our young herm are taken at first back to dear old Putnam Hall, and then to the heart of the great mining district of Colorado. All trace of a valuable mine has been lost, and the boys start out on a hunt for the property, little dreaming of the many perils which await them on their quest. How they overcome one obstacle after another, and get the best of their various enemies, will be found in the story itself.
