This is a very peculiar national activity. Publishers in Norway actually time series of books known as "Easter-Thrillers" or Påskekrim, and dates of publication are moved to Spring and released at this time when the sale of mysteries goes up 50%. TV stations, radio and newspapers follow suit by running detective series based on the works of famous crime novelists such as Agatha Christie, P.D. James, Simenon and Ruth Rendell.
Kjell Ola Dahl
Jorn Lier Horst
Great websites about Norwegian crime writers
Scandinavian Crime Fiction
International Noir Fiction
Detectives without Borders
2 Scandinavian issues of Mystery Readers Journal
Volume 30: 4 (Winter 2014-15)
Volume 23:3 (Fall 2007)
Hardcopy and PDF -- Reviews, articles and Author! Author! essays, many by and about Norwegian crime writers.
Subscribe to Mystery Readers Journal HERE.