Getting to Yes by Roger Fisher, William Ury and Bruce Patton is about a method called principled negotiation or "negotiation of merits" to overcome some obstacles when negotiating. The book is focusing on the psychology of negotiation in a method called "principled negotiation". What it means is to find acceptable solutions by determining which needs are fixed and which are flexible for negotiators. This is something everyone should learn and as with many other things in life, this can be applied everywhere, in many different situations.
This is a best seller that should be read by everyone. This book was actually given to several school districts in the U.S to help students learn "non-adversarial bargaining". If you should read one book about negotiating, look no further, this is the one.