I love this series.
It has very colorful down to earth characters with every day flaws and problems. Lots of mystery and humor.
Policy officer of a small town in North Germany Thies is called when there is a murder on a ferry taking his 2 twins to a class outing to the close by island of Amrum.
It describes ' our ' teenagers with a funny spin and with a never ending appetite for Selfies, which one of the little dears happens to film the murder victim being assaulted.
The young girl instead of turning the evidence over to the police, decides to blackmail the killer with predictable outcome.
This book is written in German and brings home back to you.