| title | ISBN-13 (ISBN-10) | year of publication |
|---|---|---|
| Alive in Africa: What's the Plot? | 978-0-521-74560-4 (0-521-74560-8) | 2009 |
| Three Clever Thinkers: What's the Plot? | 978-0-521-74559-8 (0-521-74559-4) | 2009 |
| What's the Plot? | 978-0-521-74561-1 (0-521-74561-6) | 2009 |