Katarina Wennstam was awarded for her detective series "Sekelskiftesmorden" and also received this year's honorary award from the Crimetime detective festival at the fair in Gothenburg.
"The Border Crosser" is the latest instalment in Viveca Sten's series "Åremorden", which has also become a television series on Netflix.
The audiobook publisher's awards are being presented for the eighth time and are based on data that combines "popularity, listening and ratings" from Bookbeat's nearly 300,000 Swedish listeners.
Jonas Malmsjö was named Swedish Crime Voice of the Year - winning the award for the fourth year in a row.
