At this week's Hoover Book Soiree, Samuel Tadros of the Hudson Institute and the Hoover Institution sat down with Graeme Wood to discuss his new book, The Way of the Strangers: Encounters with the Islamic State. The book both situates ISIS within context of Islamic history and theology and chronicles Wood's meetings with ISIS supporters and sympathizers across the world in an effort to understand what's behind the group's pull. It's a useful complement to the news coming out of Iraq and Syria as we begin to consider what the future of ISIS will look like after the fall of Raqqa and Mosul.