Résumé: Ostroms' book covers a variety of cases where allocational difficulties arise. She employs sound economic reasoning in analyzing a number of cases where ordinary property rights enforcment is difficult. This book illustrates how vital institutional arrangements are in managing natural resources. Self-described environmentalists should read this book to see how many of the problems that concern them can actually get solved. The history in this book is made interesting through the application of economic concepts. This is not light reading, but it surely is interesting- for serious readers.