The main character in this series of suspense books is private detective Patrick Reich. From his office he has a beautiful view of the city of Kassel, which is not free of crime ... The small detective novels are illustrated with many explanations of words, information about the country, interesting internet addresses, puzzles and exercises. Student Philipp has witnessed a brutal bank robbery. He thinks he knows who the author is. It feels watched, followed and threatened. Patricio Reich and his wife Constanze take charge of the case.