In the twenty-first novel in this new series, Tom has defeated the Electricity Vampires and now wants something a bit less diabolical to take up his time. A new X-Prize is announced that intrigues him: fly a solar-powered aircraft, non-stop, around the globe in just 36 hours That sort of speed will require an electrical powered jet, and that will burn up a lot of electricity. So, how can he manage to make what he needs by day... and still have enough to run at full speed at night? Complicating things is a mysterious woman and a deadly opponent out to keep Tom from winning or perhaps from ever getting back home.