1 In this volume we do not rehearse the arguments for reckoning that Isaiah 40–66 comes from a different author or authors from those of Isaiah 1–39.2 Within the book called Isaiah, chapters 40–55 then form a discrete unit. Both the adverbial phrase and the verbal clause in that statement need emphasis. Chapters 40–55 are an integral part of the book. †B. Duhm (2nd ed., p. vii) believed that chapters 40–66 were originally attached
Volume 1, Pages 1–2