Social media manipulators using openly available information have convinced business executives to cough up millions in fraudulent wire transfers, radicalized seemingly good kids to join the Islamic State, and changed the minds of staunch anti-Communist Reagan Republicans who now cheer the Russian government’s hacking of the Democratic National Committee. Watts knows how they do it because he’s mirrored their methods to understand their intentions, combat their actions, and disrupt their efforts. Watts examines a range of social media platforms to illuminate exactly how our enemies use Western social media for their nefarious purposes. He explains how he’s learned, through his successes and his failures, to engage with hackers, terrorists, and even the Russians—and how these interactions have generated methods for fighting back against those who seek to harm people on the internet.