| title | ISBN-13 | year of publica- tion |
|---|---|---|
| Africa | 978-1-58013-330-2 | 2008 |
| Antarctica | 978-1-58013-335-7 | 2008 |
| Asia | 978-1-58013-334-0 | 2008 |
| Australia | 978-1-58013-333-3 | 2008 |
| Australia | 978-0-8225-2492-2 | 2005 |
| Europe | 978-1-58013-329-6 | 2008 |
| North America | 978-1-58013-331-9 | 2008 |
| South America | 978-1-58013-332-6 | 2008 |