Guests are gathered at a villa in the Tuscan countryside to celebrate a betrothal that would unite two powerful Florentine families. The joyful atmosphere is shattered when the groom-to-be is discovered murdered. Everyone says the victim has no enemies, but point to his father's many adversaries. Florentine Security Commission member Nico Argenti, himself a guest, is charged with finding the killer, suspected to be one of the invited or the villa staff. The investigation exposes Nico and his colleagues to the jealous motives of guests and a chain of interconnected crimes. Each revelation in the case, ranging from bribery and theft to tax fraud and brutal assault, contributes to its growing complexity. Is simply identifying the killer enough to guarantee that he will face the consequences? Deadly Rivalries is the sixth book in the award-winning Nico Argenti Renaissance mystery series. It may be read standalone.