Free Ebook: "Mental Manipulation: The TOP 10 Manipulation Techniques, Learn How To Influence People, About Dark Psychology, Persuasion Tactics, Mind and Emotional Control, and Covert Mind Games" regularly $2.99.
Has the longest title of any book I've bought in a while :-)
Interesting book about how to manipulate people. Covers a lot of the basic techniques "bribery, gas lighting, fear-to-relief" and so on. Please only use for ethical purposes.