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The Hardy Boys Mystery Collection Volume 21-30 [10 Hardcover Book Set]
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Join the Hardy Boys for mystery-solving excitement with The Hardy Boys Mystery Stories Collection Vol. 21-30 10-Hardcover Book Set from the classic series of children's fiction.
Hardy Boys Books have been delighting young readers for decades and now the third ten captivating mysteries are available in a new slipcover for 2019.
The Hardy Boys Collection is the perfect gift for aspiring detectives, or long time fans of the series.
This collectible set is the 2019 edition and contains the third 10 mysteries in the series presented in a specially designed slipcase. Not only is it the perfect way to keep all the books together, it also looks great on the bookshelf!
The Books Included in This Set Are:

- The Clue of the Broken Blade
- The Flickering Torch Mystery
- The Melted Coins
- The Short-Wave Mystery
- The Secret Panel
- The Phantom Freighter
- The Secret of Skull Mountain
- The Sign of the Crooked Arrow
- The Secret of the Lost Tunnel
- The Wailing Siren Mystery
The Books Included in This Set Are:
- The Clue of the Broken Blade
- The Flickering Torch Mystery
- The Melted Coins
- The Short-Wave Mystery
- The Secret Panel
- The Phantom Freighter
- The Secret of Skull Mountain
- The Sign of the Crooked Arrow
- The Secret of the Lost Tunnel
- The Wailing Siren Mystery

The Hardy Boys Mystery Collection box set contains volumes 21-30 of the classic children's series of books!
- Publisher: Penguin Random House (June 1, 2019)
- Language: English
- ISBN-10: 0593089828
- ISBN-13: 978-0593089828
- Dimensions: 8.1 x 7.2 x 5.2 Inches