The teenage years are tough-for kids, and for parents. Many teenagers are grappling with a slew of overwhelming emotions, and the results can range from not wanting to be seen with a parent in public to reckless and destructive behavior that can destroy a family. Parents despair as a child becomes a sullen, defiant stranger. A clinical psychologist who's spent more than two decades bringing families back from the brink, Dr. Neil I. Bernstein knows...