sentences:  He is author of "Why People Die by Suicide" (Harvard University Press 2005) and "Myths about Suicide" (Harvard University Press 2010), and the current editor-in-chief of "Suicide and Life Threatening Behavior".In "Why People Die by Suicide", Joiner posits the interpersonal theory of suicide, a three-part explanation of suicide which focuses on ability and desire.The desire to die by suicide comes from a sense of disconnection from others and lack of belonging, combined with a belief that one is a burden on others.