Book excerpt: Crimes associated with the illegal trade in wildlife, timber and fish stocks, pollutants and waste have become increasingly transnational, organized and serious. They warrant attention because of their environmental consequences, their human toll, their impacts on the rule of law and good governance, and their links with violence, corruption and a range of crossover crimes. This ground-breaking, multi-disciplinary Handbook brings together leading scholars and practitioners to examine key sectors in transnational environmental crime and to explore its most significant conceptual, operational and enforcement challenges.