Book excerpt: David Green decides to travel thousands of kilometres from Moscow to Vladivostok on the iconic Trans-Siberian line. On the train and in the many Siberian outposts he stops at he meets a wide range of ordinary Russian people - from a group of Beatles-singing babushkas to soldiers and struggling entrepreneurs - with situations arising that are at times comical, awkward or poignant. Travelling in third class, he learns to adhere to the train's unwritten social codes and to navigate the unfamiliar environment of Siberia, occasionally shadowed by security agents.