"Hunting For Hidden Gold" by Franklin W. Dixon. The published date was not listed, but the book is copyrighted in 1928 and published by Grosset & Dunlap (New York), the book is approx 5" x 1" x 7 1/2" and weighs under one pound at 0.57lb. The book is in a good, vintage condition with some shelf-wear and the pages have discoloration due to age 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.