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The Great Wall Hears You: A Great Wall Junior Rangers Mystery: The Sound Thieves
Paperback
Series: Great Wall Junior Rangers
Publisher: Independently Published
Published: Jun 8 2026
Pages: 198
Weight: 0.47
Height: 0.50 Width: 5.50 Depth: 8.50
Language: English
A Great Wall Junior Rangers Mystery: The Sound Thieves
Book 3 of the Great Wall Junior Rangers series
When thieves attack the Great Wall with weaponized sound, it takes twelve kids, a 500-year-old drum code, and real science to fight back.
11-year-old Alex Chen, his sharp-eared sister Mia, and local Junior Ranger Li Wei just wanted to camp on the Great Wall. Then the stones started humming.
20 Hertz. Infrasound. The same banned Ming Dynasty frequency that once shattered armies.
Now a gang of sound thieves is using thunder drums to crack ancient towers and loot hidden vaults. The police think it's just tourists. But the wall is cracking at 2:03 AM every night. And Tower 12 might collapse before sunrise.
The Ming Dynasty hid a secret in the bricks: ting weng - listening jars buried in the stone. If the kids can revive the Five Fires Drum Code, they can cancel the attack with destructive interference.
The catch? They have to do it at 140 decibels. Without going deaf.
Soon, twelve village kids join the fight - armed with paper cups, yarn, and a 500-year-old drum code. Because the wall doesn't just need heroes. It needs a Quiet Team.
Perfect for readers 8-12 who love:
Middle grade mysteries like The London Eye Mystery
Blending science, adventure, and problem-solving in the spirit of The Wild Robot and Nick and Tesla
Great Wall of China books with real history + hands-on science
Junior Ranger / National Park adventures with diverse kids
Inside you'll discover:
10 hands-on 'Sound Ranger' activities inside-including how to build a listening jar, measure your school's dB, test whispering galleries, and write your mayor about noise pollution
Book 3 of the Great Wall Junior Rangers series
The wall is not stones. The wall is voices. The sky is not empty. The sky is songs. Protect both.
Turn the page. The wall is listening.
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