Hunting For Hidden Gold is Volume 5 in the original The Hardy Boys Mystery Stories published by Grosset & Dunlap. The book ranks 111th on Publishers Weekly's All-Time Bestselling Children's Book List for the United States, with 1,179,533 copies sold as of 2001. The plot concerns the theft of gold from a mining camp in Montana. At first the case is being worked on by Fenton Hardy but when he becomes injured he invites his sons Frank and Joe to join him. After overcoming many obstacles the Hardy boys recover the stolen gold and turn the outlaws over to the Sheriff.