What makes a narcissist go from self-involved to terrifying? In this national bestseller, Joe Navarro, a leading FBI profiler, unlocks the secrets to the personality disorders that put us all at risk. I should have known.How could we have missed the warning signs?I always thought there was something off about him.When we wake up to new tragedies in the news every day-shootings, rampages, acts of domestic terrorism-we often blame ourselves for missing the mania lurking inside unsuspecting individuals. But how could we have known that the charismatic leader had the characteristics of a tyrant? And how can ordinary people identify threats from those who are poised to devastate their lives on a daily basis-the crazy coworkers, out-of-control family members, or relentless neighbors?In Dangerous Personalities, former FBI profiler Joe Navarro has the answers. He shows us how to identify the four most common dangerous personalities-the Narcissist, the Predator, the Paranoid, and the Unstable Personality- and how to analyze the potential threat level. Along the way, he provides essential tips and tricks to protect ourselves both immediately and in the long-term, as well as how to heal the trauma of being exposed to the destructive egos in our world.