Since I haven't finished reading yet, here is my parents' nice summary:
Chapter 2 tells how the monarchy [in the time of Saul and David] disrupted the self-sufficient agricultural households and then the monarchs had to try to act or appear beneficently to patch up the broken system. Each of the chapters has an effective summary. It leads up to chapter 8 on Jesus' understanding and acting out of Sabbath and Jubilee. A remarkable chapter 9 concludes on a modern spirituality of Sabbath and Jubilee.