Influence: The Psychology of Persuasion by Robert B. Cialdini
Influence is a great book for new rationalists because it highlights a lot of cognitive biases with real-life examples derived from case studies. These examples are placed in the context of how the so-called 'compliance professionals' explout these biases to persuade people, who might otherwise be not so forthcoming.
Hi. I may have posted a comment or two, cannot remember. But I have been lurking for a long time.