The Nature of Depression: An Updated Review provides clear connections between psychiatric and neurological disorders. Unlike prior books on depression, this book covers many neurological and psychiatric disorders, including Parkinson’s disease, major depressive disorder, Alzheimer’s disease, PTSD, addiction and anxiety disorder. In addition, this book covers different forms of depression, including transition-induced depression and the development of depression following major life events, including birth of a child, menopause and retirement. – Covers depression comorbidity with psychological and neurological disorders- Reviews comorbidity with addiction, anxiety, trauma and psychosis- Compares the symptoms of subclinical depression to major depression- Discusses how stress and sleep impact depression- Theorizes the path of depression following negative life transitions