Since the terrorist attacks of September 11, 2001, New York has become the center of an epidemic of fear and anxiety that has spread throughout the Western world. THE HIDDEN FACE OF FEAR analyzes how our brains, on both a conscious and unconscious level, mentally process and physiologically respond to fear and anxiety, especially through a region of the brain called the amygdala, describes the social mechanisms of learning fear, coping strategies for dealing with fear, and explains how disorders such as post-traumatic stress disorder (PTSD) can be treated.