Under three hours is an unusual length for a story that intends to be both a crime and a romance. There is no room to let either strand meander, which means the pressure has to come from compression: fewer characters, a tighter timeframe, and consequences arriving faster than anyone in the story would like. Shadows of the Heartline takes that shape deliberately.
Sabine Arendt is filed with us under crime and thriller as well as romance, a pairing that has become one of the busiest crossroads in popular fiction. Danger sharpens attraction, attraction complicates judgement, and the listener is asked to worry about two things at once. The title, with its shadows and its heartline, sets out that balance clearly enough.