In ISIS: The State of Terror, two of America’s leading experts on terrorism dissect the new model for violent extremism that the Islamic State, known as ISIS, has leveraged into an empire of death in Iraq and Syria, and an international network that is rapidly expanding. Stern and Berger offer a much-needed perspective on how world leaders should prioritize and respond to ISIS’s deliberate and insidious provocations in this compelling, essential account.“ISIS should be required reading for every politician and policy maker....[Stern and Berger’s] smart, granular analysis is a bracing antidote to both facile dismissals and wild exaggerations....A nuanced and readable account of the ideological and organizational origins of the group.”—Washington Post