In the wake of a suicide, the most troubling questions are invariably the most difficult to answer: How could we have known? What could we have done? And always, unremittingly: Why? Written by a clinical psychologist whose own life has been touched by suicide, this book offers the clearest account ever given of why some people choose to die.

Drawing on extensive clinical and epidemiological evidence, as well as personal experience, Thomas Joiner brings a comprehensive understanding to seemingly incomprehensible behavior. Among the many people who have considered, attempted, or died...