"How Many Isaiahs Were There and What Does It Matter?" by Richard L. Schultz was originally published as Chapter 8 in Evangelicals Tradition, Authority and Hermeneutics, edited by Vincent Bacote, Laura C. Miguélez and Dennis L. Okholm.
Richard L. Schultz (PhD, Yale University) is the Blanchard Professor of Old Testament at Wheaton College. He is the coauthor of How to Understand Your Bible and is a regular contributor to scholarly journals and theological and biblical reference works.
This was a short, but fascinating ebook. I would give the book 5 stars as I hold to Isaiatic unity, but the author did not drive home his point in the end as I had hoped that he would. The author is very successful in demonstrating the weaknesses of a multiple authorship view of Isaiah.