| title | ISBN-13 (ISBN-10) | year of publication |
|---|---|---|
| Hallo, Freunde!: Biber-Arbeitsbuch | 978-9985-843-35-2 (9985-843-35-5) | 1998 |
| Hallo, Freunde!: Biberbuch | 978-9985-843-34-5 (9985-843-34-7) | 1999 |
| Hallo, Freunde!: Biberbuch, Vorkurs Deutche Lehrer Handbuch | 978-9985-71-137-8 (9985-71-137-8) | 1999 |