“The impression that one gets from reading the pages of Dr. Allis’ calm and scholarly book is that if the question of whether there was one author of Isaiah, or two, or three, or more, were brought up in a court of law, the case of those who claim several authors for this sublime prophecy would quickly be thrown out of court for lack of evidence. . . .
The question of the unity of the Book of Isaiah cannot be separated from the question of its witness to and its prediction of the work of Christ as our Redeemer. All those who believe that the book of Isaiah predicts the birth, the good works and miracles, the shameful death, the resurrection, and the grand and final triumph of Christ, when he shall “divide the spoil with the strong” and shall “see the travail o his soul and shall be satisfied,” will find solid ground for their belief and their hope in this timely and most notable book by Dr. Allis. The whole Christian world is indebted to him.” — Clarence Edward Macartney, from the Foreword