| title | ISBN-13 | year of publica- tion | other author(s) |
|---|---|---|---|
| Air | 978-0-435-04160-1 | 1962 | R.W. Crossland |
| Animals | 978-0-435-04167-0 | 1964 | " |
| Electricity | 978-0-435-04164-9 | 1963 | " |
| Friction and Machines | 978-0-435-04163-2 | 1963 | " |
| Heat | 978-0-435-04166-3 | 1964 | " |
| How Your Body Works | 978-0-435-04790-0 | 1967 | " |
| Magnets | 978-0-435-04162-5 | 1963 | " |
| Water | 978-0-435-04161-8 | 1962 | " |