This volume is a tour de force; a systematic and often original organization of knowledge about an aspect of our environment that is usually taken for granted. Each of us, upon reflection, can recognize the determining importance of the 'nonhuman' in his own life whether it be a familiar landscape, or plant, or animal, or a manufactured object or context of personal importance. When the familiar landscape includes other people, or when the object in question is one of those that serve as a functional or symbolic extension of other human beings or of our own selves—and this is most often the case—the theoretical importance of dividing the nonhuman from the human becomes less clear. Yet the attention devoted to the interhuman (interpersonal) has resulted in insufficient consideration of human-nonhuman interaction and Searles has rectified this deficiency. It may be well to note in passing that both