“I want to go to war with China,” said presidential hopeful Rick Santorum in a recent GOP debate, showing the cavernous lack of any good sense that has become his trademark. Nonetheless, Santorum was probably speaking for many Americans who fear that China may soon overtake the US as the world’s single great power. By contrast, many of those same Americans probably think of Saudi Arabia, whose obliging princes seem always at the ready to pump extra crude onto the world market to temper oil price spikes, as the American motorist’s best friend. But what if the tables were turned, and the kingdom became the scourge of the American infidel while the People’s Republic was set to be our biggest ally? That’s the geopolitical premise of R. Michael Conley’s new peak-oil thriller Lethal Trajectories.