In China's vast northwestern region, more than a million and a half Muslims have vanished into internment camps and associated factories. Based on hours of interviews with camp survivors and workers, thousands of government documents, and over a decade of research, Darren Byler, one of the leading experts on Uyghur society uncovers their plight. Revealing a sprawling network of surveillance technology supplied by firms in both China and the West, Byler shows how the country has created an unprecedented system of Orwellian control. A definitive account of one of the world's gravest human rights violations, In the Camps is also a potent warning against the misuse of technology and big data.