Nonviolent Communication by Marshall Rosenberg
"An enlightening look at how peaceful communication can create compassionate connections with family, friends, and other acquaintances, this international bestseller uses stories, examples, and sample dialogues to provide solutions to communication problems both at home and in the workplace. Guidance is provided on identifying and articulating feelings and needs, expressing anger fully, and exploring the power of empathy in order to speak honestly without creating hostility, break patterns of thinking that lead to anger and depression, and communicate compassionately. Included in the new edition is a chapter on conflict resolution and mediation." - Powell's Books
The Little Book of Conflict Transformation by John Paul Lederach
If you're new to the ideas and methods behind the power of conflict transformation, the "Little Books" series from Eastern Mennonite University's Center for Justice & Peacebuilding is a great place to start. Check the link for a comprehensive list.
The Anatomy of Peace by The Arbinger Institute
The Anatomy of Peace asks, What if conflicts at home, conflicts at work, and conflicts in the world stem from the same root cause? What if we systematically misunderstand that cause? And what if, as a result, we unwittingly perpetuate the very problems we think we are trying to solve?
The Evolution of Trust by Nicky Case
"I think game theory can help explain our epidemic of distrust – and how we can fix it!"
- the author
Count Your Chickens by Peaceable Kingdom Games
"Take turns but work together. Collect all the chicks, and everyone wins! Count Your Chickens! eliminates stress, empowers a young learner, and teaches kids that playing together can be fun! Kids practice counting and cooperation. Help your kids learn at an early age how easy it is to cooperate!" - from the game description