Knot of Shadows — Lois McMaster Bujold

When a corpse is found floating face-down in Vilnoc harbor that is not quite as dead as it seems, Temple sorcerer Penric and his chaos demon Desdemona are drawn into the uncanny investigation.  Pen's keen questions will take him across the city of Vilnoc, and into far more profound mysteries, as his search for truths interlaces with tragedy. The internal chronological order of the Penric & Desdemona tales is presently: Penric's DemonPenric and the ShamanPenric's FoxMasquerade in LodiPenric's MissionMira's Last DanceThe Prisoner of LimnosThe Orphans of RaspayThe Physicians of VilnocThe Assassins of ThasalonKnot of Shadows