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William Gurstelle
Books
Backyard Ballistics
2012
The Art of the Catapult
2018
Whoosh Boom Splat
2017
Ready the Cannons!
2016
Defending Your Castle
2014
The Art of the Catapult
2004
Audiobooks
Adventures from the Technology Underground: Catapults, Pulsejets, Rail Guns, Flamethrowers, Tesla Coils, Air Cannons, and the Garage Warriors Who Love Them (Unabridged)
2006