Attorney here! (Not providing legal advice - seek licensed counsel in your jurisdiction if you need legal advice.)

Any act that would provide material assistance is sufficient. Criminal law is pretty liberal about what constitutes an "act" in furtherance of a crime. If it concerns you, stay far far away.

But merely publishing information in a book or on a publicly-accessible website for all to see is not generally going to get in you trouble (subject of course to copyright, publishing classified information, etc.).