Series 584:
This series of 6 books was mostly concerning transport.
However, several of the books were reprinted with different covers or contents making it a surprisingly difficult series to collect!
1. THE LADYBIRD BOOK OF BRITISH RAILWAY LOCOMOTIVES
2. THE LADYBIRD BOOK OF MOTOR CARS
3. THE LADYBIRD BOOK OF AIRCRAFT
4. THE LADYBIRD BOOK OF COMMERCIAL VEHICLES
5. A LADYBIRD BOOK OF FLAGS
6. MERCHANT SHIPS