In his eightieth year, Colin Thubron takes a dramatic and often treacherous journey from the Amur's secret source to its giant mouth, covering almost 3,000 miles.'Thubron on top form. Richly detailed, immaculately written and full of insights and encounters that bring a complex corner of the world to life' MICHAEL PALINRising in the Mongolian mountains and flowing through Siberia to the Pacific, the Amur River forms the tense border between Russia and China. This is the most densely fortified frontier on Earth.Harassed by injury and by arrest from the local police, Thubron makes his way along both the Russian and Chinese shores. By the time he reaches the river's desolate end, a whole, pivotal world has come alive.'A masterpiece' William Dalrymple'Unforgettable' Antony Beevor'An epic journey along a frozen, fraught frontier... Fascinating' The Times'This book is a triumph' Daily TelegraphWinner of the Stanford Dolman Travel Book of the Year Award 2022