original question: What adaptation is adapted from [Via Mala]
answer: via mala, via mala
answer type: Adaptation.
auxiliary information: Via Mala is a novel by the Swiss writer John Knittel, which was first published in 1934. After the disappearance of a tyrannical sawmill owner in a village in Switzerland, his family is widely suspected of having murdered him.
What novel by the Swiss writer John Knittel is an adaptation of [Via Mala]?