How many movies have Per Wahlöö and Rolf Börjlind collaborated on?

They have worked on 26 movies together! Their first movie together was Beck 01 - The Decoy Boy (1997) while their highest rated movie together was Beck 08 - Trails in Darkness (1998). They have not worked together since Beck 26 - Buried Alive (2010). They are most known for their crime films together.