The Hardy Boys: Undercover Brothers is a detective fiction series of books published by Aladdin Paperbacks (an imprint of Simon & Schuster), which replaced The Hardy Boys Digest paperbacks in early 2005.[1] All the books in the series have been written under the pen name of Franklin W. Dixon.
- ^ Finnan, Robert W. "The Hardy Boys Undercover Brothers". hardyboys.us. Retrieved 2018-01-01.
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