Book 6 in the family-friendly series, "The Life and Travels of Da Vinci" series. (Though the books can be enjoyed in any order!) Troubles seem to be the new normal for a busy Leonardo. The Signoria in Florence have threatened to sue him to finish the Battle Painting he had started and walked away from. The friars in Milan are suing him to redo an altarpiece he had done for them almost two decades before. And his eleven half-siblings are suing him to keep him from inheriting their uncle's property. Meanwhile he has caused the injury of a trusted assistant who had test-flown his flying machine, and Giovanni Rustici, a good friend in Florence, needs his assistance with a major sculpture commission he has won. Can Leonardo keep himself out of jail long enough to satisfy the various litigants, assist Rustici, and still help the young Raphael who has come to Florence to learn from him?