Book Shout-out: Radical Reconciliation
The most challenging book on reconciliation I've read is Radical Reconciliation: Beyond Political Pietism and Christian Quietism by American theologian Curtiss DeYoung and South African theologian Allan Boesak. I particularly like it because it uses both theological and practical angles to show how reconciliation, justice and power redistribution are inextricably intertwined. It is quite profound and it helped me better understand the upside-down nature of the family of God. Here's a short video of DeYoung and Boesak talking about what radical reconciliation looks like:
Also, I recently wrote a brief summary of one of the chapters of the book in which Boesak creatively and masterfully pulls reconciliation principles from the story of Zacchaeus (Luke 19). Check it out!