This is an excellent resource book for those seeking to learn more about alternative construction methods and materials. It introduces the reader to straw bale, cob, light straw clay (a marvelous material), rammed earth and many other ecologically appropriate materials. It doesnt provide enough detail to help you build with these materials but it will help you choose which might be good for you and guides you to some of the key people and resources. The chapter on natural conditioning of houses is outstanding and provides performance estimates for a variety of building materials in cities as diverse as Denver and El Centro. david bainbridge is one of the authors of the Straw Bale House and a pioneer in passive solar heating and cooling.