One of the trademarks of Colin Thubron’s travel writing is the beauty of his prose; another is his gift for talking to people and getting them to talk to him. Shadow of the Silk Road encounters Islamic countries in many forms. It is about changes in China, transformed since the Cultural Revolution. It is about false nationalisms and the world’s discontented margins, where the true boundaries are not political borders but the frontiers of tribe, ethnicity, language and religion. It is a magnificent and important account of an ancient world in modern ferment.