The Routledge Companion to Intelligence Studies provides a broad overview of the growing field of intelligence studies.

Part I: The Evolution of Intelligence Studies 1. The Development of the Field of Intelligence Studies, Loch Johnson Part II: Abstract Approaches to Intelligence 2. Theories of Intelligence, Michael Warner 3. Cultures of Intelligence, Mark Phythian 4. Philosophy, theory and Intelligence, Jennifer Sims 5. Strategists and Intelligence, Gerald Hughes 6. The Cycle of Intelligence, David Omand 7. The Evolving Craft of Intelligence, Robert David Steele Part III: Historical Approaches to Intelligence 8. Signals Intelligence, Julian Richards 9. Human Intelligence, Len Scott 10. Economic Intelligence, Peter Davies 11. Technical Intelligence, Matthew Aid 12. Open Source Intelligence, Stevyn Gibson Part IV: Systems of Intelligence 13. United Kingdom, Michael S. Goodman 14. United States, Stephen Marrin 15. Canada, Andrew Brunatti 16. Australia, Frank Cain 17. France, Pierre Lethier 18. India, Rudra Chaudhuri 19. China, Nick Eftimiades 20. Japan, Ken Kotani 21. Israel, Uri Bar-Joseph 22. Germany, Anna Daun 23. Russia, Reginald Brope 24. Spain, Ruben Arcos Part V: Contemporary Challenges 25. Terrorism and Asymmetric Opponents, Neal Pollard and John Sullivan 26. Cybersecurity, Dave Clemente 27. Globalisation and Borders, Richard Aldrich and Zakia Shiraz 28. Weapons of Mass Destruction, James Wirtz 29. Energy, Food and Resources Security, Petra Dolata 30. Intelligence Liaison, James Walsh 31. Communications, Privacy and Identity, Robert Dover 32. Intelligence Oversight and Accountability, Claudia Hillebrand 33. Organised Crime, Peter Gill