Although the final pages do discuss what putting the observation of the Sabbath might look like, I found the history of the Sabbath that the author shared to be very interesting. Much of the book focuses on that.
Mr. Robinson also talks about the differences in opinion about which day of the week the Sabbath actually should be observed, and then shared his opinion as well. Also are the "forbidden" activities, but then the author tempers those forbidden things with the assurance that he (the author) does not want us to be burdened or obliged to follow all or any of them.
My take-away? Just as Mr. Robinson states on page 208: "The weekly Sabbath was intended to look backward and forward". It is a time for us to remember God's goodness and provision in our lives during the previous week and to ask for His blessings for the coming week.
Disclosure of Material Connection: I was provided a free copy of this book by Moody Publishers in exchange for my honest opinion.