The Hardy Boys, brothers Frank and Joe Hardy, are fictional characters who appear in several mystery series for children and teens. The series revolves around teenagers who are amateur sleuths, solving cases that stumped their adult counterparts.
The Melted Coins is Volume 23 in the original The Hardy Boys Mystery Stories.
A case involving counterfeit money, buried treasure, and the Curse of the Caribees, Frank and Joe solve the mystery of the Melted Coins and help shut down both a local counterfeiting ring and a much larger operation dealing in stolen gold.
Room for a few swaps. BYOP