Getting to Yes and Mind and heart of the negotiator were required texts for the college class I took on Negotiation and Conflict Management. IIRC, they are both research-based. The first is a quick read, the second is a lot meatier.
The class is available online via CSU-Bakersfield if you care to spend some mulah and a few months on it. When I took it (a zillion years ago, not terribly long after my pet dinosaur and rotary phone went extinct), we did a round of practice negotiations towards the end of class. It was awesome. I have no idea if it has changed any.
http://www.amazon.com/Mind-Heart-Negotiator-Leigh-Thompson/d...
The class is available online via CSU-Bakersfield if you care to spend some mulah and a few months on it. When I took it (a zillion years ago, not terribly long after my pet dinosaur and rotary phone went extinct), we did a round of practice negotiations towards the end of class. It was awesome. I have no idea if it has changed any.
Peace.