Here's more help in understanding the stuff called NLP:

Edward Bernays
Ivy Lee
Walter Lippmann

You really don't need any forbidden books. In fact none of the books are forbidden. They are available on Amazon or Barnes and Noble.

Read about these guys and you'll have a thorough understanding of NLP. They were accomplished practitioners.

In the alternative, study propaganda and you'll have one hell of a start. That by itself will make quite an NLP wizard out of you.

Just me thinking out loud...