The richest mystery here, however, is Florence itself, whose intricate politics and class structure Nabb parses with precision and wit. Washington Post Book WorldSummoned by an aged woman to investigate mysterious noises in the vacant flat next to hers, Marshal Guarnaccia discovers a dying Dutch jeweler. The old lady had known him when he was a boy growing up in Florence. Could he have returned to the family home just to commit suicide? Or could the man be the victim of a cunning murderer?