[An] interesting volume and the work on the theory of counterintelligence is a valuable contribution to the field.... This volume contains several valuable ideas and should be work that counterintelligence scholars become familiar with.

LSE Review of Books

Prunckun has again delivered a robust and flexible text with the Second Edition of Counterintelligence Theory and Practice. There is rapid growth in the areas of law enforcement intelligence, national security intelligence, counterintelligence, homeland security, terrorism, and numerous other disciplines related to the issues and techniques discussed in this book. These areas require conceptual guidance and tangible techniques related to intelligence and counterintelligence that reflect contemporary issues. Indeed, Prunckun has struck an exemplary balance between pedagogy, research, and practice that should be a must-read for any student, scholar, or practitioner in the arenas of intelligence and counterintelligence. His command of counterintelligence issues and craftsmanship is nothing short of impressive.

Jeremy G. Carter, PhD, associate professor and director of criminal justice and public safety, School of Public and Environmental Affairs, Indiana University – Purdue University Indianapolis

Prunckun has written an outstanding book on what is often an incredibly complex subject. Counterintelligence Theory and Practice is a must read for students of intelligence studies. Its historical examples and set activities also make this text an essential resource for teachers of counterintelligence.

Troy Whitford, Lecturer in Intelligence and Security Studies, Australian Graduate School of Policing and Security, Charles Sturt University

Increasing information asphyxia, fake news, hacking, aggressive espionage, and debates about what are legitimate state secrets all challenge those working in the counterintelligence space. In such a crowded threat environment, Prunckun’s sound and no-nonsense primer on the subject peels away the complexity for CI practitioners, whether working in national security, law enforcement, military, or private sector contexts.

Patrick F. Walsh, Charles Sturt University, Editor, Australian Institute of Professional Intelligence Officers Journal, author of Intelligence and Intelligence Analysis