While the classic struggles between parents and teenagers still remain, societal changes have brought about many new struggles that parents of earlier generations never dreamed of.  Today's teenagers navigate a faster, less clearly anchored world, and Dr. Wolf's revisions include a new section about the Internet, a significantly modified section on drugs and drinking, and an added piece on gay teenagers.  This new edition gives the bewildered parents a road map to the rocky and ever-changing terrain of contemporary adolescence.