The book "Constitutional Change: Or, Sunday, Sabbath, Change and Restoration. A Discussion Between W. H. Littlejohn, Seventh-day Adventist, and Editor of the Christian Statesman" is written by Wolcott G. Littlejohn. This book opens a discussion about the religious significance of selected days of the week, particularly Sunday and Saturday, in Christian culture. The author offers his thoughts, arguments and evidence, expresses his point of view regarding the Sabbath as a day of rest contained in the Ten Commandments of God, as well as the importance of Sunday in church life. This book gives the reader an opportunity to deeply consider and understand the differences and the essence of different views on this topic.