I read The Manipulated Man and wished I'd read it long ago. It's recommended in the side panel here under Take the Red Pill Challenge. Others I enjoyed are:

The 48 Laws of Power

The Ultimate Secret of Total Self-Confidence

I'd add The Conquest of Happiness by Bertrand Russell too, but, I couldn't find a PDF for it.

I'd be interested in any other recommendations you would add to the list?