Environmental Policy Integration (EPI) is an innovative policy principle designed to deliver sustainable development. This book offers an unrivalled exploration of its conceptualization and implementation, drawing upon a set of interlinked case studies of the most common implementing instruments and the varied experience of applying them in six OECD states and the EU. Written by a team of international experts, it identifies and explains broad patterns and dynamics in what is an important area of contemporary environmental policy analysis. This insightful account of the state-of-the-art aims to offer a valuable resource for academics interested in environmental politics and policy analysis, as well as the broader, interdisciplinary theme of 'governance for sustainable development'.It will interest advanced undergraduate and postgraduate students taking courses in comparative politics, public administration and environmental politics and policy-making. Given the continuing political relevance of sustainability, it should also appeal to NGOs, think tanks and international bodies attempting to coordinate policies across and within different levels of governance.