From the bestselling author of Musicophilia and On the Move, a final volume of the great physician's essays showcases his broad range of interests--from his passions for ferns, swimming, and horsetails, to his final case histories exploring schizophrenia, dementia, and Alzheimer's.In his final book, Oliver Sacks examines the passions that defined his life--both as a doctor engaged with the central questions of human existence and as a polymath conversant in all the sciences. Everything in Its Place brings together some of his finest writings on a rich variety of topics. Why do humans need gardens? How, and when, does a physician tell his patient she has Alzheimer's? What is social media doing to our brains? In several of the compassionate case histories included here, we see Sacks consider the enigmas of depression, psychosis, and schizophrenia for the first time. In others, he returns to conditions that have long fascinated him: Tourette's syndrome, aging, dementia, and hallucinations. In counterpoint to these elegant investigations of what makes us human, this volume also includes pieces that celebrate his love of the natural world--and his final meditations on life in the twenty-first century. Everything in Its Place gives us an intimate portrait of a master writer and thinker at work.