From a shopping trip in suburban Texas, via China’s central bank, Nigerian railroads, the oilfields of Iraq and beyond, the economist and broadcaster follows the incredible journey of a single dollar to reveal the truths behind what we see on the news every day, and to see how the global economy really works. Why would a nation build a bridge on the other side of the planet? Why is China the world’s biggest manufacturer – and the USA its biggest customer? Is free trade really a good thing?