300 OSINT Techniques, Tools, and Methods for
Due Diligence, Background Checks, Fraud Detection, and Business Intelligence
Fourth Edition (2025–2026)
The definitive handbook of business intelligence, investigation, and OSINT.
How do you verify a company before a partnership or acquisition? How do you assess someone's digital footprint without crossing legal boundaries? How do you detect early signals of fraud, shell companies, or reputational risk — using only open data?
This book answers those questions. With 300 practical, legally compliant techniques designed to turn public information into decision-grade intelligence.
Who is this book for?
What you will learn
About the author
Philippe Dylewski is a consultant and trainer specializing in OSINT, investigation methods, due diligence, and digital risk analysis, with operational experience across Europe and Southeast Asia. He has trained compliance teams, investigators, and executives in practical, legally compliant intelligence workflows. He currently coordinates the activities of an international network of investigators present in 47 countries, specializing in the search for missing persons worldwide. He published his first book in France in 2009 and hasn't stopped writing since.
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