The aging of populations and the high prevalence of chronic diseases, both of which are risk factors for suicide and both of which characterize an increasing number of countries, as well as the increasing prevalence of several mental disorders. The continuing growth of several other risk factors for suicide make it possible to predict an increase in suicide rates worldwide unless resolute action is undertaken to prevent suicidal behavior. A major problem in that respect is that, in many countries, suicide is not seen as a major public health problem despite its frequency and the severity of its consequences. A textbook bringing together current knowledge about suicide, its causes and its prevention is a precious tool for public health efforts and for clinicians’ daily work. This book provides useful information which will help health professionals and provide them with data that they can use in developing proposals for action.