One of my favorite books is Educating Intuition by Robin Hogarth, but in a pinch, this will do:

McKinsey Quarterly: How to test your decision-making instincts, 2010-May, by Andrew Campbell and Jo Whitehead

Given the powerful influence of positive and negative emotions on our unconscious, it is tempting to argue that leaders should never trust their gut: they should make decisions based solely on objective, logical analysis. But this advice overlooks the fact that we can’t get away from the influence of our gut instincts. They influence the way we frame a situation.