OK, I'm biased. I'm Sam's brother. But I saw this gang work on this book for YEARS. They brainstormed an underlying theory of group dynamics that drove meetings. By 1983, when I came to California and started attending their meetings, this theoretical work was well underway. The crowd working on it was a collection of psychologists and several other professionals (legal, computing, writing, etc.)
By 1983, they were already training people to be facilitators and recorders.
As the facilitator training developed into a powerful 15-session class, they polished a remarkable set of self-contained slides. The slides illustrated techniques, insights, and overall models of how agreements are reached and how discussions are (or aren't) progressing.
Once the slides were in good shape (for teaching purposes), they spent five years turning them into pages of a remarkably clear, practical, and insightful book.
This is a valuable book for anyone who wants to create and run meetings that promote worthwhile discussions and result in genuine agreements.
--- Cem Kaner