In September 2015 an earthquake shook the foundations of British politics. Jeremy Corbyn, a lifelong and uncompromising socialist, was elected to head the Labour Party. How this remarkable twist of events came about is the subject of Alex Nunns' highly readable and richly researched account. Drawing on first-hand interviews with those involved in the campaign, including its most senior figures, Nunns traces the origins of Corbyn's victory. Giving full justice to the dramatic swings and nail-biting tensions of an extraordinary summer in UK politics, Nunns' telling of a story that has received widespread attention but little understanding is as illuminating as it is entertaining.