A dead biology graduate, a billionaire investor, a mysterious house and a rare beetle keep detectives Burkhard "Butsch" Schulz and Viola Delbrück busy this time as they finally investigate side by side again.
1986
2017
1977
2020
2024
2011
2022
2018
1973
2002
1987
2013
2021
2005
2009
2019
