Unity and Disunity in Isaiah
Wipf and Stock (Cascade Companions)
2026
Isaiah is one of the Bible's most famous texts. In the modern era, it has also become one of the liveliest topics in the historical study of how the Bible was written. Challenging the traditional ascription to Isaiah himself, scholars overwhelmingly regard the book as a composite work that was produced by different people over several centuries. Beyond this basic consensus, however, there is fierce division over the details. The most important disagreement concerns whether the book is ultimately characterized by unity or disunity. Scholars who read the book for unity argue that while it is certainly composite, each layer nevertheless built on and reshaped the previous ones, yielding a purposeful, coherent whole. Scholars who read the book for disunity argue instead that it is a loose combination of self-sufficient texts that need to be interpreted separately. In Unity and Disunity in Isaiah, Ethan Schwartz offers a serious yet accessible overview of this scholarly debate, bringing out its historical, exegetical, and theological stakes. Readers will gain the tools to begin making sense of how this book was written—and how, in turn, it should be read.
Endorsements
“Everyone these days is emphasizing the need for better communication. They should take a lesson from Ethan Schwartz. In this book he brilliantly distills the essence of current scholarship to introduce readers to the complex question of how the book of Isaiah came to be written.”
—H. G. M. Williamson, Emeritus Regius Professor of Hebrew, University of Oxford
“Ethan Schwartz offers an excellent and accessible overview of one of the central debates in Isaiah scholarship: how to understand the relationship between the book’s compositional diversity and the process by which its diverse materials were shaped into literary unity.”
—Tova Ganzel, Associate Professor in the Multidisciplinary Department of Jewish Studies, Bar-Ilan University
“Ethan Schwartz provides non-specialists with a detailed exploration of Isaiah that is scholarly, up-to-date, and accessible. It will deepen readers’ appreciation of the book’s complexity and the different ways that scholars have met the challenges it presents.”
—Andrew Davis, Professor of Old Testament, Boston College
“In Unity and Disunity in Isaiah, Ethan Schwartz provides a superb introduction to the history of the book of Isaiah and current approaches to both its diversity of materials (disunity) and its readability as a literary work (unity). . . . In so doing, he provides a rewarding and engaging point of entry to the modern interpretation of Isaiah.”
—Nathan Mastnjak, Assistant Professor of Hebrew Bible, University of Notre Dame
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