On orders from Duke Cesare Borgia, Leonardo exposes a necromancer as a fraud, which implicates a noble family in the plot to murder cardinals and is finally released from his contract to the Duke. Leonardo is finally free to return home to Florence and wishes only for a simpler life so he can work in peace and solitude. However, Pisa has declared their independence from Florence and now occupies the principal port in Tuscany cutting off Florence's access to trade Leonardo is commissioned to devise a plan to divert the waters of the Arno which will leave Pisa with no outlet to the sea. The plan is compromised by the appearance of a monster / serpent in the Arno near the construction site. The deaths of several workmen are attributed to this serpent and the Pisans are suspected of sabotage. But the real perpetrators are determined to destroy Leonardo's reputation. They plant evidence of their thievery and murders to implicate him while at the same time an assassin is waiting for the order to kill him. The threats against Leonardo extend to Niccolo's family when his wife is abducted. This mystery has many twists and turns with a surprise ending. Don't wait Order this book now.
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