The novel centres around Giovanni Borgia, a mysterious figure known in history as the infans Romanus, or child of Rome. Although he bears one of the most notorious names in all of Italy, Giovanni doesn't know his parentage. Is Cesare Borgia his father or his brother? Or is he no relation at all? Is Lucrezia Borgia his mother or his sister -- or possibly both? Hella Haasse uses the ferment and intrigue of the Italian Wars -- during which French, Swiss,...