This is the fifth and final volume in a series of books examining the problem of suicide around the world and how suicide can be prevented. There are many groups of individuals that have been the focus of special interest. Part One of this volume presents current research and interventions for these groups, including those who have chronic medical illnesses, who are homeless and who are very young. Suicide in the workplace and in jails and prisons presents particular problems for mental health professionals, and the problems involved in preventing suicide in these situations are discussed. Part Two presents discussions of issues that have been of particular concern in recent years, such as whether antidepressants precipitate suicidal behaviour in some people as well as preventing it in others and the complex issues involved in physician-assisted suicide.