*Is Sunday Really Sacred?* by Joe Crews is a booklet that examines the biblical and historical basis for Sunday worship. It explores whether Sunday, the first day of the week, holds special sacredness according to Scripture, or if the traditional observance of Sunday as a day of rest and worship is rooted in human tradition rather than biblical command. Crews provides a clear analysis of the origins of Sunday observance and contrasts it with the biblical Sabbath, offering insights into the importance of honoring God's commandments.