What makes a narcissist go from self-absorbed to frightening? In this national bestseller, Joe Navarro, a leading FBI profiling expert, decodes the secrets of personality disorders that threaten us all.

"I should have known."
"How could we have missed the warning signs?"
"I always thought something was off with him."

As we wake up every day to news of new tragedies—shootings, rampages, acts of domestic terrorism—we often blame ourselves for overlooking the mania in unsuspecting individuals. But how could we have known that the charismatic leader had the traits of a tyrant? And how can ordinary people recognize threats from those who are ready to wreak havoc on their lives daily—the deranged coworkers, the out-of-control family members, or the relentless neighbors?

In "Dangerous Personalities," former FBI profiling expert Joe Navarro provides 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 analyze their potential threat level. Along the way, he offers crucial tips and tricks to protect ourselves both immediately and in the long term, as well as insights on how to heal from the trauma caused by encounters with the destructive egos in our world.