Rolston presents a brilliantly provocative challenge for us to think about how we should behave toward the environment. Do we have a ``duty'' to other living things? Is there a difference between killing for food and hunting deer? Do animalsor plants and other insentient life formshave ``rights''? These questions only suggest the wide-ranging concerns Rolston raises to help us develop an ethic and mode of conduct toward the living world. He suggests ways for government, business, and the individual to make philosophical peace with the natural order. A required book for public and natural science collections. Daniel LaRossa, Connetquot P.L., Bohemia, N.Y.