Gavin de Becker book The Gift of Fear
Source: The Gift of Fear: Survival Signals That Protect Us from Violence

In this work, Gavin de Becker shows you how to spot even subtle signs of danger - before it's too late. Shattering the myth that most violent acts are unpredictable, de Becker offers specific ways to protect yourself and those you love, including ideas on how to act when approached by a stranger.
Gavin de Becker book The Gift of Fear
Source: The Gift of Fear: Survival Signals That Protect Us from Violence