The Green Book, by Elizabeth Rogers and Thomas Kostigen, has many useful tips for living, working, and traveling more sustainably. Before each chapter, a brief story is given, written by a celebrity about sustainable living in his or her life. The stories are fun, and give the reader a peak into probably unknown parts of the lives of Jennifer Aniston, Robert Redford, Martha Stewart, and others- that Jennifer Aniston takes three minute showers to conserve water, that Robert Redford used to spend his summers working in Yosemite, and that Martha Stewart only heats her house to 64°F because it is so well insulated. The stories seem unconnected to the chapters that follow them, but should nevertheless inspire a large audience, and are a nice break from reading so many tips. Each tip is presented with an impressive statistic about how if each person of a certain sized group of people conserved only a small amount of a certain resource, that it adds up to saving a massive amount of money, energy, or other resources. Some of the statistics are less good than others, though. And when you combine some of the tips, they sometimes seem to contradict each other. For example, in the “Travel” section, the third “simple step” is to “Pack lightly. Every additional ten pounds per traveler requires an additional 250 million gallons of jet fuel per year, which is enough to keep a 747 flying continuously for ten years.”