This book analyses the recent emergence of transnational forms of environmental regulation within the larger conceptual context of global governance research and institutional theory. Increasingly, private policies at the transnational level complement, and in some cases even replace, public interventions. The author takes a deep and broad look at the phenomenon to account for both the emergence and the influence of private institutions in global governance and sustainability. Focusing on the empirical arenas of sustainable forestry and corporate environmental reporting and management, Philipp Pattberg examines why and how private forms of policy-making emerge at the transnational level and how their impacts can be analysed. The study makes a threefold contribution to current debates; firstly, it provides a novel theoretical perspective on the phenomenon of private governance in global sustainability politics. Secondly, it offers a fresh conceptualisation of global governance as a meta-theory in the social sciences. And finally, it provides detailed insights into the empirical landscape of private governance in the areas of global forestry and corporate environmental reporting. This book bridges disciplinary boundaries by providing a detailed account of recent developments in global business regulation as an important aspect of the current sustainability debate. As such it will appeal to a wide audience of both academics and researchers in the fields of environmental policy, public sector economics, international relations and global environmental and sustainability politics in particular. It will also be of interest to practitioners involved in private rule-making and sustainable development.