Out of print, but an excellent book for your collection.
http://www.amazon.com/Sabbath-Scripture-History-Kenneth-Strand/dp/0828000379/ref=sr_1_1?ie=UTF8&qid=1397384498&sr=8-1&keywords=the+sabbath+in+scripture+and+history
Everything ever written in Religion and Theology formatted for Logos Bible Software.Logos Youtube Channel
I have this in hardback but would be happy to have it searchable and hyperlinked.
Loan mine out David, and cannot remember who I loan it to.
This is also on my list!