Synopsis: From the front flap of the Gates and Bridges hardback: "A handful of college students notice strange things afoot at Sparo Aeronautics, birthplace of the most sophisticated jet fighter project in the world. Someone is trying to sabotage the secret weapon, which in turn threatens the nation's security. Their callous foes have money and influence and do not hesitate to use them, with deadly force if necessary. But the students receive guidance and support from a surprising source - the bearded, elegant, and genial Venetian Leonardo da Vinci. His experience as well as his extraordinary understanding of complicated technical facts and the equally intricate dynamics of the human mind guarantee the defeat of the conspirator's evil plans."