Principles of Conservation Biology, third edition is a complete revision of the most comprehensive textbook on conservation biology. First published in 1994 the book is richly praised by reviewers, teachers, and students alike. Written by leading experts in the field, it is intended for use in conservation biology courses at the advanced undergraduate and graduate levels, as well as by researchers and practitioners. The text introduces the major themes and concepts of the diverse and dynamic field of conservation biology. The biological and social underpinnings of conservation problems and potential solutions are interwoven throughout the book. Guest essays and case studies provide a diversity of perspectives and real-world examples add insight and provoke discussion. The third edition features a wholly revised organization, emphasizing both analyzes of different categories of threat and approaches to conservation. Coverage has been expanded to emphasize both terrestrial and marine conservation issues, and efforts in the US and across the globe. The book is richly illustrated, and chapters are complemented with annotated reading lists and questions designed to stimulate thought and class discussions.