Geert Baudewijns, full-time ransomware negotiator, is called every week by hacked companies and governments across the globe.

But by then, it's too late. Cybercriminals have infiltrated the system.

To prevent worse-case scenarios - weeks of downtime, all your data leaked - over 70 percent of the victims give in to ransom demands. And malicious hacker collectives on the dark web are making fortunes.

This is still a taboo because no one wants to go public with it. Who is at risk? How do hackers operate? How can we protect ourselves?

In this book, Baudewijns takes the reader into the dark side of the digital world. His insider stories describe recent cases from around the world.