The book "The Complete Testimony of the Fathers of the First Three Centuries Concerning the Sabbath and the First Day" by John Nevins Andrews is a detailed study of the views of the church fathers on the Sabbath and Sunday. In this book, the author systematically collects and analyzes the texts of early Christian writers of the first three centuries AD, which relate to the issue of celebrating the day of rest. The reader will be able to learn more about the views of the church fathers on this problem and understand the historical context of the formation of Christian beliefs in the period of the early church. This book will be a useful resource for those interested in the history of Christianity and the development of traditions in the first centuries AD.