As much as the various harlot daughters of Armstrongism deny it, the Church of God is an off shoot of Adventism that was tied into the false prophecies of William Miller. The COG and Adventism are both harlot daughters of Millers utterings.
The 227 page book is here: Lying For God: What Adventists Knew and When They Knew It
Every Saturday, a goodly number of SDA pastors preach sermons about things they know could not possibly be true. Every Monday through Friday SDA University professors of history and religion teach things they know are nothing more than fairy tales. They understand that they would be fired if they acknowledge what they know. For example, no Adventist Hebrew scholar would dare to teach his students what Genesis 2, Exodus 16, and Exodus 20 have to say about the origins and proper application of the Sabbath concept.
Sabbatarianism develops when a proof-texting approach to Bible study is utilized that ignores the major themes, concepts, and principles of the Bible. Its greatest single cause is an unfortunate ignorance of the nature of God's Law and the way New Testament writers, and especially St. Paul, thought and wrote about the LAW. For this reason your authors have spent a lot of time researching and presenting a biblical view of the Law as it would have been understood by St. Paul. Additionally we demonstrate that a few SDA theologians have betrayed their awareness of these principles by mentioning them in their own work.