39 books • 10 series
The Telephone (How it Works S.)
Trains (Ladybird leaders)
Merchant Ships (Ladybird recognition books)
The Ocean Liner (How it Works S.)
The Computer (How it Works S.) (How it works)
Printing Processes (How it Works S.)
The Story of Printing (A Ladybird achievements book)
Farm Machinery (How it Works S.)
The Camera (How it Works S.)
Television (How it Works S.)
The Locomotive (How it Works S.)
The Aeroplane (How it Works S.)
The Rocket (How it Works S.)
The Motor Car (How it Works S.)
The Story of Motor Car (Achievements S.)