Written by Dr. Seth Erlandsson, a frequently-published former Director of the Bible Research Centre of the Biblicum Foundation, this one-volume commentary defends the unity of the book of Isaiah and points to evidence of divine inspiration.

Known for its key messianic prophecies and importance among the Major Prophets, the book of Isaiah has faced decades of ongoing debate over its authorship and authenticity. Many modern Bible scholars assert that the book of Isaiah had multiple authors over the centuries. These theories seemingly cast doubt on the Bible's claims of divine inspiration and the integrity of Jesus' claims about himself.

Dr. Seth Erlandsson addresses these theories, including the Deutero-Isaiah theory, and provides evidence for Isaiah's unified writing style. He focuses especially on interpreting Isaiah chapter 41, the epicenter of the authorship debate. His straightforward and organized writing style creates a clear guide through Isaiah's many historical and linguistic details.