1. Introduction and overview. Part One: The Nature of Deliberate Self-Harm in Adolescents. 2. Investigating deliberate self-harm in adolescents. 3. The nature, prevalence and impact of deliberate self-harm and other suicidal phenomena in adolescents. 4. How do adolescents who deliberately self-harm or have thoughts of self-harm differ from other adolescents? 5. Adolescents' help seeking, coping strategies and attitudes and their relevance to deliberate self-harm. Part Two: Prevention and Treatment of Deliberate Self-Harm in Adolescents. 6. Schools and deliberate self-harm. 7. The health service and deliberate self harm. 8. Self-help, crisis lines, the Internet, media and deliberate self-harm 9. Conclusions. References. Appendix I Guidelines used in the Schools Study for categorising respondents' descriptions of deliberate self-harm. Appendix II Information sheet given to participants after they completed the questionnaire. Appendix III Self-harm: guidelines for school staff. Appendix IV Robson's self concept scale (short version). Appendix V Useful contact addresses in the UK for advice for young people with problems, or their friends or relatives in need of advice. Appendix VI Sources of information about deliberate self-harm, suicide and mental health problems. Appendix VII Further reading. References. Subject index. Author index.