This book clearly describes the methods and concepts in layperson's terms behind Ecological Footprinting. If you are interested in the subject at a personal or academic level then this book is a must. I used this book to help build a sustainability assessment computer model for an MSc dissertation and this research is hopefully to be published soon in a scientific journal. When studying the main criteria I had was to get ideas and information into my head as quickly as possible. This book is written in such a way that it achieves this very effectively - clear diagrams, metaphors, examples and writing. Everything is written to the point and honed in so that no time is wasted when reading it. A fantastic book packed with information and well done to the author Mathis Wackernagel for inventing (with Rees) such a well used and ground breaking method for measuring Ecological Footprinting.