books by subject
Children's Books on Heavy Machinery
100 Inventions That Made History
Master Engineer: Robots
MONSTER MACHINES TRUCKS
The World's Most Unusual Machines (Extreme Machines)
Wheels Keep Turning: a book about simple machines (Wonderwise)
Digger (Machines at Work)
Until I Met Dudley: How everday things really work
My First Trucks and Diggers Let's Get Driving
Stickmen's Guide to Gigantic Machines
Hammer at the Construction Site!: 10 Construction Sounds (10 Button Sound)
Jumbo Jets (Mighty Machines (Hardcover))
How to Draw Machines (Usborne Pocket Art)
How Machines Work (Children's World)
How to Catapult a Castle: Machines That Brought Down the Battlements (Fact Finders, Extreme)
Dig!: Peek a Flap Children’s Board Book (Peek a Boo Dig! Fun Children's Interactive Lift a Flap Board Book for Ages 0 and Up)
Printing (Usborne How to Guides)
Racing Along (Big Shiny Machines)
Big Machines Rescue!
Mighty Machines (Q & A Reference S.)
Science Tools: Rulers and Tape Measures
Science Tools: Microscopes and Magnifying Glasses
Simple Machines: Inclined Planes
Moving Buddies: Move & Play Fun! (Novelty)
Robotics (Usborne Introductions) (Usborne Introductions S.)
How Machines Work
All about Machines: Amazing Inventions That Made Life Easier
Heart-Stopping Roller Coasters
Record Busters: Machines
How People Learned to Fly
