This document consists of Part 3 of a book of readings on at-risk youth designed to provide information and strategies for counselors, teachers, parents, administrators, social workers, and others who work with youth at risk. It includes six readings, each dealing with a specific behavior that places a young person at risk. "The Secret and All-Consuming Obsessions: Anorexia Nervosa and Bulimia Nervosa" (Frances Kempley & Wanda Weber) addresses anorexia nervosa and bulimia nervosa from a female perspective, stresses signs and symptoms that alert the helping professional, and presents theories of both causation and treatment to deal with the problem. "Female, Single, and Pregnant: Adolescent Unwed Mothers" (Rosemary Thompson & Ardis Sherwood) considers the extent of the problem, needs of the adolescent mother, and intervention methods. Exemplary prevention and intervention programs are presented. "No Guarantee of Immunity: AIDS and Adolescents" (Lizbeth Gray & Reese House) provides information on Acquired Immune Deficiency Syndrome needed by the helping professional who works with adolescents. "'I Don't Want to Live': Suicidal Behavior" (Dave Capuzzi & Douglas Gross) considers the extent of the problem, signs and symptoms, and causation and treatment modalities. "Tough Enough: Gang Membership" (Alcena Boozer) examines the youth gang phenomenon, presenting information on youth especially at risk of gang involvement. "'Why Say No?': Substance Abuse Among Teenagers" (Sharon Robinson) examines adolescent substance abuse from a variety of perspectives--psychosocial, historical/legal, and psychophysiological. (NB)