How many movies have Maj Sjöwall and Niva Westlin Dahl collaborated on?

They have worked on 20 movies together! Their first movie together was Beck 17 - The Scorpion (2006) while their highest rated movie together was Beck 23 - The Silent Scream (2007). They have not worked together since Beck 47 - Dödsfällan (2022). They are most known for their mystery films together.