K. Schafer · Kevin Shafer · Kevin Spear
NorthWord Books for Young Readers · Tecklenborg
| title | ISBN-13 (ISBN-10) | year of publica- tion | |
|---|---|---|---|
| Penguin Planet | 978-1-55971-745-8 (1-55971-745-9) | 2000 | |
| Penguins 123 | 978-1-55971-830-1 (1-55971-830-7) | 2002 | |
| Pinguine | 978-3-924044-90-9 (3-924044-90-2) | 2001 |