As one ages he/she will definitely encounter a lot of people who will do their best to make the most out of him/her.
Are there any books regarding this ??
Psychology & Neuroscience Stack Exchange is a question and answer site for practitioners, researchers, and students in cognitive science, psychology, neuroscience, and psychiatry. It only takes a minute to sign up.Sign up to join this community
From a hackers perspective I would recommend to check out a term called "social engineering". This is all about manipulating people in order to get sensitive information.
A great book about this is called The Art of Human Hacking
Look for persuasion methods. Read any book written for sales people. They use these methods a lot. Every time when I came across a sales person I bring my shield up because I know for a fact that most of them are well trained in these methods. For them it is a way of living