Book excerpt: This definitive book examines and engages with the work of Vincent and Elinor Ostrom, along with the Bloomington School of Political Economy more generally. The contributors emphasize the continuing relevance of the Ostroms’ work on collective action, self-governance, and institutional diversity for interdisciplinary research in the social sciences and humanities. This book’s wide array of topics and approaches will be a valuable resource to readers in a variety of fields, including: political science, economics, philosophy, sociology, public administration, environmental studies, and political economy.