The Melted Coins (Hardy Boys, No. 23)

Frank and Joe Hardy suspect that their best friend Chet Morton is the victim of a summer school swindle and offer to help get his money back. While probing a baffling burglary at the Seneca Indian Reservation in New York State they investigate Zoar College located nearby. A startling connection between the Zoar College swindle and the theft of the Seneca’s gold tribal relic Spoon Mouth propels the teenage sleuths into a series of perplexing and dangerous situations.

• The Flickering Torch Mystery (Hardy Boys, Book 22)
• The Short-Wave Mystery (Hardy Boys, Book 24)
• The Clue of the Broken Blade (The Hardy Boys, No. 21)
• The Secret Panel (The Hardy Boys, No. 25)
• The Phantom Freighter (The Hardy Boys, No. 26)
• The Secret of Skull Mountain (Hardy Boys, Book 27)
• The Secret of the Lost Tunnel (Hardy Boys, Book 29)
• The Sign of the Crooked Arrow (Hardy Boys, Book 28)
• The Mystery of the Flying Express (Hardy Boys, Book 20)
• The Wailing Siren Mystery (Hardy Boys, No. 30)