Nonviolent Communication: A Language of Life (1999) by clinical psychologist Marshall B. Rosenberg offers a life-affirming, empathy-based approach to conflict resolution. The goal of practicing Nonviolent Communication, or NVC, is not to win an argument...
NVC is a topic that requires study in depth to master, and regular practice, so I would not expect it to make the reader an expert. This brief summary offers a clear review of many key points, and several relevant examples from recent events that date after the book was written. It also references related works for further reading.