Brian Andrews and Jeff Wilson are best-selling thriller authors including the Tier One series. Their latest, Defense Protocol, published on Tuesday, is a great new addition to the Tom Clancy-based series that includes President Jack Ryan (whom I still picture as a 50-yr-old Harrison Ford). The plot is basically how President Ryan's daughter, Katie, tries to stop a Chinese scheme to take Taiwan. As with all such thrillers, the plot seems uncomfortably plausible.