Make has one https://www.amazon.com/Make-Rockets-Down-Earth-Science/dp/1457182920/
It's the type of book that should be easy to find at library, or on Libby etc.
If you're ready to go deeper into the weeds than just some basic principles, then Harry Stine's Handbook of Model Rocketry is probably your next step.
https://www.amazon.com/Handbook-Model-Rocketry-7th-Official/dp/0471472425/
I recommend getting him involved hands-on with flying model rockets (don't worry, it's safe and doesn't require him to make rocket fuel), then getting involved with rocketry competitions through your local NAR club. Once he's motivated by these challenges, he can read up & win some competitions.
You can find your local NAR club here:
https://www.nar.org/find-a-local-club/nar-club-locator/
I started with model rocketry around his age. It help motivate me to go into engineering. I still do it as a cranky old fart.
Estes is the biggest name in the model rocketry world. One of their launch sets has almost everything you need to build and fly:
https://estesrockets.com/product-category/rockets/launch-sets/
Here's an overview of how to get started with building & flying:
https://estesrockets.com/get-started/
I recommend checking out this book. It as applied projects, math, and some computer programs he can write & run.
Mike Westerfield\ Make: Rockets: Down-to-Earth Rocket Science\
https://www.amazon.com/Make-Rockets-Down-Earth-Science/dp/1457182920
Then, this book:
Make: Rockets: Down-to-Earth Rocket Science by Mike Westerfield
https://www.amazon.com/Make-Rockets-Down-Earth-Science/dp/1457182920
It's a design for "Juno" from "Make: Rockets" by Mike Westerfield.
Excellent intro book that can largely carry folks from considering through MPR.
https://www.amazon.com/Make-Rockets-Down-Earth-Science/dp/1457182920
Estes repository (already here) is excellent.
Make: Rockets: Down-to-Earth Rocket Science by mike westerfield (https://www.amazon.com/Make-Rockets-Down-Earth-Science/dp/1457182920/ref=sr_1_4?ie=UTF8&qid=1530426166&sr=8-4&keywords=model+rockets+book)
Check out Scott Manley videos in Youtube (he has a lot of stuff up, but astrophysics and rockets are mixed in.) https://www.youtube.com/user/szyzyg
For bigger rockets (and their propellant chemistery) Read up Ignition! ( John Drury Clark). (https://www.amazon.com/Ignition-Informal-Propellants-University-Classics/dp/0813595835/ref=sr_1_1?ie=UTF8&qid=1530426323&sr=8-1&keywords=ignition+rocket+book)
And of course, Kerbal Space Program in Steam is an easy wait to orbital mechanics and rocket flight in general.
The newer Make: books are good too.
Make: Rockets: Down-to-Earth Rocket Science
Make: High-Power Rockets: Construction and Certification for Thousands of Feet and Beyond
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