After the Caliphate: The Islamic State & the Future of the Terrorist Diaspora

In this book, Clarke aims to cover what he calls “global jihadism,” although he primarily focuses on al Qaeda and the Islamic State (or ISIS). His account ends several months before ISIS lost the last of its territory with the fall of Baghouz, in Syria, in March of this year, but Clarke’s main message is that the jihadists will regroup in Iraq and Syria and that al Qaeda and ISIS will lead the way. What is more controversial, he argues that the launching of a caliphate by ISIS, in 2014,...