Here is a way you can study the Sabbath issue in Scripture:
Perspectives on the Sabbath:
Chris Donato joins the panel to speak about various views on the Sabbath. Mr. Donato has editing the book Perspectives on the Sabbath: 4 Views published by Broadman and Holman Publishers. Skip MacCarty (Andrews University) defends the Seventh-day view which argues the fourth commandment is a moral law of God requiring us to keep the seventh day (Saturday) holy. Jospeh A Pipa (Greenville Presbyterian Theological Seminary) backs the Christian Sabbath view which reasons that ever since the resurrection of Christ, the one day in seven to be kept holy is the first day of the week. Craig L. Blomberg (Denver Seminary) supports the Fulfillment view which says that since Christ has brought the true Sabbath rest into the present, the Sabbath commands of the Old Testament are no longer binding on believers. Charles P. Arand (Concordia Seminary) upholds the Lutheran view that the Sabbath commandment was given to Jews alone and does not concern Christians. Rest and worship are still required but not tied to a particular day.
see http://andynaselli.com/four-views-on-the-sabbath for a quick review of the book.