I had been searching for a book on rules, their relationships to the structure of organizations, and to the outcomes produced by such organizations. The focus of this search was on commons based resources. I found what I was looking for when I found this book - it was immensely rewarding to read. At its heart is an outline of a discipline devoted to identifying what works and what doesn't work in terms of structuring organizations and the rules under which they operate. The first part of the book focusses on the use of game theory in this context. The second part of the book focusses more on the discipline of how to go about diagnosing instutional rule bases and exploring their consequences. The last part of the book provides some insight into what has been learned as a result of applying these tools - something that is well worth reading on its own. This book is essential reading for those who are concerned about human - environmental systems and interactions. Overall - a superb book.