Summary: In this book the author argues that a strong connection to nature is essential for human health. Supported by research, anecdotal evidence, and personal stories, the author shows how tapping into the restorative powers of the natural world can boost mental acuity and creativity; promote health and wellness; build smarter and more sustainable businesses, communities, and economies; and ultimately strengthen human bonds. He outlines seven precepts he calls the "Nature Principle", which include balancing technology excess with time in nature; a mind/body/nature connection, which he calls "vitamin N," that enhances physical and mental health; expanding our sense of community to include all living things; and purposefully developing a spiritual, psychological, physical attachment to a region and its natural history. The book presents examples of these precepts, from studies of how exposure to a common soil bacteria increases production of serotonin in the brain to designing shopping malls inspired by termite mounds.