As being Dutch I've seen (parts of) this story before. It reminds me a bit of the Silk Road story, as in: who is who, are they indeed victims as they say, or not...
I recently read the "Mocro Mafia"; a Dutch non-fiction book about the 'war' that's still going on in Amsterdam (and Antwerpen too) between two groups of criminals dealing with drugs-import. It's all based on facts (and of course a lot of hearsay) and police-reports, but it reads like a script for a Hollywood-movie.
I don't know about an English version, but don't be surprised if it turns up next to the "Heineken Kidnapping"-book.
A fascinating read, thanks for sharing.