The Department of Sensitive Crimes / Alexander McCall Smith.

The detectives who work in Malmo Police's Department of Sensitive Crimes take their job very seriously. The lead detective, Ulf Varg, prioritizes his cases above even his dog's mental health. Then there are detectives Anna Bengsdotter, who keeps her relationship with Varg professional even as she realizes she's developing feelings for him, or at least for his car, and Carl Holgersson, first to arrive in the morning and last to leave, who would never read his colleagues' personal correspondence, unless it could help solve a crime, of course. Finally, there's Erik Nykvist, who peppers conversations with anecdotes about fly fishing. Along with an opinionated local police officer named Blomquist, the Department of Sensitive Crimes takes on three extremely strange cases. First, the detectives investigate how and why a local business owner was stabbed in the back of the knee. Next, a young woman's imaginary boyfriend goes missing. And, in the final investigation, Varg must determine whether nocturnal visitations at a local spa have a supernatural element.