> The book does what it says on the tin but it's more on persuasion methods and framing, which of course can be used for nefarious purposes.

An interesting result of reading those books is one starts to recognize when one is being manipulated.

Just the other day a door-to-door salesman appeared at my door, and he tried a number of classic sales techniques on me. He lacked, however, some accouterments that a legitimate salesman would have, so I had to be pretty firm in saying no.