books by subject
Children's Books on Heavy Machinery
Inventions: A History of Key Inventions that Changed the World
How Things Work: Simple Mechanisms
Speed Machines
U.S. Military Fighter Planes
How People Learned to Fly
Record Busters: Machines
Heart-Stopping Roller Coasters
Cool Cars: Band 03 Yellow/Band 12 Copper (Collins Big Cat Progress)
Look What Came from China
Mighty Machines (Ripley's Believe It or Not!)
Collins Big Cat Phonics for Letters and Sounds - Dig and Tip: Band 02A/Red A
DK Eyewitness Books: Robot: Discover the Amazing World of Machines
Seemore Readers Giant Machines
Robot Brains: All About Machines That Think
Pulleys
Screws, Nuts, and Bolts
Mr Shaha's Marvellous Machines: adventures in making round the kitchen table
Simple Machines: Discover Science Through Facts and Fun
Switch On, Switch Off
Machines Rule: In Space
Make Tracks: Farm