Klub Srebrnego Klucza
Series (Klub Srebrnego Klucza = Silver Key Club) issued by Państwowe Wydawnictwo "Iskry", Warszawa. Also named as Seria „Z kluczykiem” (Series with the key).
Publisher Series 3
| Ruchomy Cel | Pocket book | |
 | Sprawa Galtona | Pocket book |
 | Siostrzyczka | Pocket book |
Series 1
 | Broszka z zielonych kamieni | Paperback |
Added by vyaczs