The fourth chapter, "Risk Factors for Suicidal Behavior" by M.A. Oquendo and colleagues, provides a useful discussion of a more tightly focused problem. They provide a stress-diathesis model and suggest that a diathesis may be indicated by impulsivity, pessimism, substance abuse, lack of social support, and a history of suicide attempts. They point out that in routine clinical practice, previous suicide behavior is properly documented in less than one-quarter of admissions. They consider half a dozen instruments and provide a copy of the Columbia Suicide History Form.