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Chapter Book · Ages 9–12 · 1995 · Est. 3.5 hour read
The Hypersonic Secret
Written by Franklin W. Dixon
Book #135 in the The Hardy Boys series
Frank and Joe unravel a conspiracy linked to a vanished pilot.
3.8 Goodreads · 98 ratings
160 pages· 31,800 words· Est. 3.5 hour read· ~810L
$3.99Save 5%
In stock. Also at Amazon.
Bookroo's summary
When an air taxi pilot vanishes, Frank and Joe Hardy dive into a mystery tangled with sabotage and secrets. Their investigation leads to millionaire Ian Fairbanks, whose ties to a national conspiracy could change everything. As they dig deeper, the brothers must navigate a web of deceit and danger. Can they uncover the truth before it's too late?
From the publisher
Another adventure involving Frank and Joe, the intrepid Hardy boys.
At a glance
- Format
- Paperback
- Pages
- 160
- Words
- 31,800
- Reading age
- 9–12
- Audience
- Middle Grade
- Lexile
- ~810L
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