| title | ISBN-13 | year of publica- tion | other author(s) |
|---|---|---|---|
| Discovering Science: a Primary Course for Namibia: Grade 6 | 978-0-435-89613-3 | 1997 | Henriette Speelman |
| Discovering Science Grade 7 | 978-0-435-89615-7 | 1998 | |
| Jaws: Non-Fiction - How Muscles Work/Leverage | 978-0-435-89867-0 | ||
| Sensation JAWS Discovery | 978-0-435-89852-6 | 2001 | |
| Water: Nature's liquid miracle | 978-0-435-89857-1 | 2000 | |