|Title and Author/Editor:||The Tower Treasure, The Secret of the Old Mill, The Shore Road Mystery, The Great Airpot Mystery, What Happened at Midnight, While the Clock Ticked, The Hidden Harbor Mystery, The Secret Warning, The Twisted Claw, Mystery of the Flying Express, The Shattered Helmet, The Mysterious Caravan, The Witchmaster’s Key, The Jungle Pyramid, and The Firebird Rocket by Franklin W. Dixon|
|Genre:||Children’s, Mystery, Crime and Detective|
|Publisher:||Grosset & Dunlap|
|Period:||Mid to Late 20th Century|
|Place of Publication:||New York|
|Number of Books:||15|
- shaken but tight bindings, loose hinges, page discoloration, edge wear, bowing, and bumped and cocked spines; some interior writing.
- measures one.