Unlike conventional detectives who follow procedural methods, Barlach operates in moral grey areas, often becoming complicit in crimes to achieve justice. His methods are more psychological than physical, and he's willing to blur ethical lines in pursuit of what he considers righteous outcomes.

These novels combine elements of traditional detective fiction with existential philosophy and moral complexity. Rather than focusing solely on solving crimes, they explore deeper questions about justice, morality, and human nature, while challenging conventional narrative structures.

The setting provides a complex moral landscape where questions of justice and accountability are particularly poignant. Switzerland's neutrality during the war and the presence of former Nazis in society create tension and moral ambiguity that drives the narratives forward.