Offensive Intelligence: 300 techniques, tools and tips to know everything about everyone, in business and beyond Fourth edition (2025-2026)

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?

• Compliance officers, lawyers, and auditors
• Investigators, journalists, and security professionals
• Risk managers, fraud examiners, and due diligence consultants
• Executives, entrepreneurs, and M&A professionals
• Recruiters, financial managers, and debt collection specialists
• Investors looking to secure their projects before committing

What you will learn

• Master Google dorking and advanced OSINT search techniques
• Find a person anywhere in the world
• Locate a place from a single photograph
• Uncover hidden documents, poorly protected databases, and leaked data
• Navigate the dark web — without (too much) risk
• Conduct corporate due diligence and detect shell companies
• Analyze digital footprints, social media, and online presence
• Understand how easy it is to usurp an identity — and how to protect against it
• Build repeatable investigation workflows for business and risk analysis
• Understand the legal and ethical limits of OSINT

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.