| title | ISBN-13 | year of publication |
|---|---|---|
| Attack and defense | 978-0-7699-0477-1 | 1999 |
| Bright ideas | 978-0-7699-0475-7 | 1999 |
| Hidden world | 978-0-7699-0492-4 | 1999 |
| Rain or shine | 978-0-7699-0473-3 | 1999 |
| Reptiles and amphibians | 978-0-7699-0490-0 | 1999 |
| Sharks and rays | 978-0-7699-0467-2 | 1999 |
| The plant kingdom | 978-0-7699-0481-8 | 1999 |
| Volcanoes | 978-0-7699-0485-6 | 1999 |