As the last child in Ireland to receive a full Druidic education, Diana Beresford-Kroeger has brought an unusual and ancient holistic attitude to the science of trees, which has led her to many fresh insights into how closely we are tied to one another and to the natural world. Her influential message is to pay rapt attention to trees, because they are the green heart of the living world. Each of the essays gathered in this book show us a slice of the natural world through Diana’s unique lens, illuminating the way our health, individually and as a species, is tied to the health of the forest—a tie we ignore at our peril. She maps the science that still needs to be done—there is so much we don’t know about the ways trees and forests work—but also, eloquently, shows us the path to survival that her own science has revealed, the “bioplan” or blueprint for the connectivity of life in nature.