In this book, Matthew K. Nock and colleagues add to the growing scientific literature on global mental health problems. Their book offers a fresh perspective on the epidemiology of nonlethal suicidal behavior by presenting data from more than 100,000 study participants, from 21 countries, who participated in the World Health Organization World Mental Health Survey Initiative. The book is organized into five sections. In the introductory section (chapters 1–3), the authors review the global burden of suicidal behavior and the methods of the World Mental Health survey and provide an updated literature review on what is already known about suicidal behavior across the globe. The second section (chapters 2 and 4) focuses on two cross-sectional studies on the prevalence and onset of suicidal behavior, transitions in the behavior, and persistence of the behavior over time. The authors describe a number of novel findings from these two studies. Most remarkable was the finding that “in all countries, the highest risk period for transitioning from ideation to plan or to attempt occurs during the first year after the onset of ideation (p. 73).” For clinicians, this emphasizes the importance of not shying away from asking about suicide ideation or plans because the period within which we must take action to prevent a suicide act is quite limited.