Read by Ray Porter Drawing on their unusual access to intelligence sources, law enforcement, and groundbreaking research, two of Americas leading experts on violent extremism and terrorism explain the genesis, evolution, and implications of todays most barbaric jihadist army, Islamic State - and how we can fight it. Though terrorist groups are a fixture of contemporary politics and warfare, the world has never witnessed the degree of sheer brutality demonstrated by the group know as ISIS - the Islamic State of Iraq and the Levant. Its sadistic disregard for human life, sophisticated use of social media, acquisition of territory, and ability to attract foreign fighters - many from modern Western democracies - is unprecedented. Jessica Stern and J. M.