Nils-Olof Franzén
![Nils-Olof Franzén](https://upload.wikimedia.org/wikipedia/commons/6/68/Nils-olof_franzen.jpg)
He was director of programmes for Swedish Radio from 1956 to 1973, and also wrote a number of biographies.
The first of his Agaton Sax books, ''Agaton Sax klipper till'', was published in 1955. According to a description inside ''Agaton Sax and the Criminal Doubles'', Franzén originally wrote the stories for his son. Provided by Wikipedia
1
Published: 1958
Superior document: Stockholm studies in history of literature 3