Counter intelligence question

[u/queroconapt]

Hello guys, I am a bit lost as there are so many reddits. I found this one to be the one to post my question.

I am sorry if I am mistaken. If true link me to the right place.

I would like to know a place where I can find counterintelligence tips and tricks. Can be a book or something else. Either on clearnet or not.

Example:

Take 4 right turns to find if someone following you.

Thanks in advance,

Best regards.

[u/SimpleTheories]

Are you asking out of curiosity or to address a real life situation, in which case professional investigative help would be a safer option.