1. Introduction -- 2. Skills needed to become a successful investigator -- 3. Foundations of investigation -- 4. Interviews, interrogation, and taking statements -- 5. Legal investigations -- 6. Fraud investigation -- 7. Computer crime -- 8. Criminal investigation -- 9. Death investigation -- 10. Terrorism investigations -- 11. Insurance and arson investigation -- 12. Domestic investigations -- 13. Due diligence and background investigations -- 14. Locates and skip tracing -- 15. Surveillance -- 16. Service of process -- 17. Testifying in court -- 18. Ethics -- 19. Finding a niche -- 20. Getting licensed -- 21. Operating a professional investigative agency -- 22. Professional associations.