Chapter. 1. Counterintelligence Theory -- Chapter. 2. The Cyber Operational Environment -- Chapter. 3. Cyber Threats (and Opportunities) -- Chapter. 4. Psychology and Criminal Profiling -- Chapter. 5. Counterespionage -- Chapter. 6. Technical Surveillance -- Chapter. 7. Physical Surveillance -- Chapter. 8. Data Analysis -- Chapter. 9. Attack Attribution -- Chapter. 10. Practical Deception -- Chapter. 11. Legal Issues in Cyber Counterintelligence -- Chapter. 12. Ethical Issues in Cyber Counterintelligence.