From Sabbath to Sunday : A Historical Investigation of the Rise of Sunday Observance in Early Christianity
"...to show how and why Christians moved their day of worship from Saturday to Sunday..."  --Martin E. Marty, Ph. D., Prof. Church History, Chicago Divinity School, THE CHRISTIAN CENTURYFROM SABBATH TO SUNDAY is a remarkable ecumenical portent.  --Marcus Ward, THE EXPOSITORY TIMES, EnglandFROM SABBATH TO SUNDAY is a thorough and painstaking piece of research...  --Bruce M. Metzger, Professor of New Testament, PRINCETON THEOLOGICAL SEMINARY JOURNAL