"After a decade of therapy and a stint in a psychiatric ward to treat suicidal depression, Arianna Rebolini was "better." She'd published her first book, enjoyed an influential, rewarding publishing job, and celebrated both a marriage and the birth of her first child--but none of it was enough to keep the desire to die at bay. One night, grappling with overwhelming debt and a prolonged depression, she composed goodbye letters to her husband and son...