This textbook introduces students to the sub-field of critical security studies through a detailed yet accessible survey of emerging theories and practices. This 3rd edition contains two new chapters and has been fully revised and updated. Praise for the 3rd editon: 'The welcome third edition of this textbook continues to provide a superb introduction and overview of critical security studies. Combining breadth and depth, it provides an excellent entry-point for students as well as a rich survey of contemporary issues and research for those working in the field.'-- Michael C Williams, University of Ottawa, Canada 'The third edition maps the vibrant developments and contestations that have both extended and reshaped the landscape of critical security studies. By combining approaches and issues, Critical Security Studies: An Introduction offers a layered and nuanced analysis of the field. The addition of emergent theoretical approaches and novel issues of (in)security renders thisedition indispensable for both newcomers to critical security studies and scholars well-versed in the debates.'-- Claudia Aradau, King's College London, UK 'This book represents the state of the art with regard to critical security studies. Drawing on a remarkable range of scholarship, the authors address some of the most critical security issues facing us today. I highly recommend this text to all those interested in understanding how security (including human, ontological and everyday security) works in multiple ways and how it affects states, groups and individuals.'-- Catarina Kinnvall, Lund University, Sweden Praise for the 2nd edition: 'I use Critical Security Studies as a required reading for my courses in Paris and London- it is in my view the best introduction to the topic and this second edition is very welcome.'-- Didier Bigo, King's College London, UK 'Combining breadth and accessibility with cutting-edge contributions, the second edition of this book provides an excellent overview of critical security studies today.' -- Michael C. Williams, University of Ottawa, Canada 'This second edition gives us a most welcome update of what remains a key introduction to critical security studies. It is great to see the most recent developments in this vibrant field of research included.' -- Jef Huysmans, Open University, UK 'In mapping the recent advances and debates in the vibrant field of critical security studies, this book will be crucially important to students and scholars alike. Critical Security Studies: An Introduction highlights a different topography of critical approaches to security, which is more complex, layered and messy than existing maps have allowed us to see. The book is thus more than an introduction to the field - it is an injunction to rethink the political-theoretical underpinnings in critical approaches and take the debates further.'-- Claudia Aradau, King's College London, UK