"E. K." · Engelbert Kötter · Englebert Kotter
| title | ISBN-13 | year of publication |
|---|---|---|
| Gerbils | 978-0-7641-0939-3 | 1999 |
| My Gerbil and Me | 978-0-7641-1923-1 | 2002 |
| Rosliny w pojemnikach | 978-83-7404-319-9 | 2006 |
| Ziola w kuchni | 978-83-7184-273-3 | 2007 |
| Z ogrodu do kuchni | 978-83-7184-226-9 | 2004 |
Barrons Educational Series · Hachette Livre Wiedza I Zycie · Kdc Klub Dla Ciebie