I believe he was referring to Daniel Goleman's Emotional Intelligence[1].

Edit: Though it's been a while since I read it last, I remember finding it very informative and insightful. I don't think you need to be a psychologist or neuroscience expert to read it and benefit.

[1]: http://www.amazon.com/Emotional-Intelligence-Matter-More-Tha...

dmiladinov is right with the book. I bought it half a year ago, actually I also got pointed to it via some HN post. I only read a few dozen pages at the start and in the middle yet, but it is certainly interesting I think. IIRC the reviews on Amazon are very mixed though.