Backyard Ballistics: Build Potato Cannons, Paper Match Rockets, Cincinnati Fire Kites, Tennis Ball Mortars, and More Dynamite Devices

The Book of Totally Irresponsible Science: 64 Daring Experiments for Young Scientists

Mini Weapons of Mass Destruction: Build Implements of Spitball Warfare

Mini Weapons of Mass Destruction 2: Build a Secret Agent Arsenal

Mini Weapons of Mass Destruction 3: Build Siege Weapons of the Dark Ages

The Practical Pyromaniac: Build Fire Tornadoes, One-Candlepower Engines, Great Balls of Fire, and More Incendiary Devices

Junk Drawer Physics: 50 Awesome Experiments That Don't Cost a Thing (Junk Drawer Science)

The Big Book of Catapult and Trebuchet Plans!

Defending Your Castle: Build Catapults, Crossbows, Moats, Bulletproof Shields, and More Defensive Devices to Fend Off the Invading Hordes

The Dangerous Book for Boys

Mini Weapons of Mass Destruction: Build and Master Ninja Weapons