To many, a border is a geographical fact. But what happens when a border is subject to an emergency? Today, as millions are forced to migrate due to war, famine and political unrest, it is important to analyse how states use new bordering techniques to control populations. New Borders focuses on the Greek island of Lesbos. Since 2015, the island has come under intense scrutiny as more than one million people have disembarked on its shores. During this time, the authors spent two years studying the changing meanings and functions of the EU's border. They observed how the reception of the refugees slid into detention and refuge became duress. Examining how and why this happened, they tackle questions on European policy, the securitisation of national and EU borders and the real impacts this has had on everyday life, determining who 'belongs' where and when.