Here are some books we recommend

Facilitation & Retrospectives

Kaner, Sam et al., The Facilitator's Guide to Participatory Decision-Making, New Society Publishers 1996

Kerth, Norm, Project Retrospectives: A Handbook for Team Reviews, Dorset House 2001

Stanfield, R. Brian, The Art of Focused Conversation: 100 Ways to Access Group Wisdom in the Workplace (ICA), New Society Publishers 2000

Negotiation

Fisher, Roger, and William Ury, Getting to Yes, Penguin Books 1991

Stone, Douglas, et al., Difficult Conversations. How to discuss what matters most, Penguin Books 2000

Cultural Diversity

Nisbett, Richard E., The Geography of Thought: How Asians and Westerners Think Differently ...and Why, Free Press 2003

Levine, Robert V., A Geography of Time: The Temporal Misadventures of a Social Psychologist, or How Every Culture Keeps Time Just a Little Bit Differently, Oneworld Publications 2006

Social Complexity

Arrow, Holly, et al., Small Groups as Complex Systems, Sage Publications, Inc., 2000

Olson, Edwin E., and Glenda H. Eoyang, Facilitating Organization Change - Lessons from Complexity Science, Jossey-Bass 2001

Stacey, Ralph D., Complex Responsive Processes in Organizations. Learning and Knowledge Creation, Routledge 2001

Sense-making

Dervin, Brenda, Sense-Making METHODOLOGY Reader, Hampton Press 2003

Kurtz, Cynthia, and David Snowden, The new dynamics of strategy: Sense-making in a complex and complicated world, IBM Systems Journal, Vol 42, No. 3, 2003

Snowden, David, Multi-ontology Sense-making: a new simplicity in decision making, Management Today Yearbook 2005

Weick, Karl, Sensemaking in Organizations, Sage Publications 1995

Weick, Karl, Managing the Unexpected. Assuring High Performance in an Age of Complexity, Jossey-Bass 2001

Metaphor

Kittay, Eva, Metaphor: Its Cognitive Force and Linguistic Structure, Oxford University Press 1990

Lakoff, George, and Mark Johnson, Metaphors we live by, University of Chicago Press 2003