David Bokovoy responds to Kent P. Jackson's chapter in the book A Reason for Faith on Deutero-Isaiah.
David Bokovoy, "The Truthfulness of Deutero-Isaiah: A Response to Kent Jackson (part 1)," rationalfaiths.com, May 17, 2016, accessed July 27, 2023
One of the most insightful perspectives held by mainstream biblical scholars involves the historical development of the book of Isaiah. Since the 20th century, all mainstream scholars have held the position that chapters 40-66 were written after the Jewish exile into Babylon (c.a. 586 BCE). Scholars typically identify the exilic material in 40-55 by the title Deutero-Isaiah, and the post-exilic material in 56-66 by the title Trito-Isaiah (though these works may have been written by multiple authors). This means, of course, that the second half of the book of Isaiah was not written by the historical Isaiah, a prophet who lived in Jerusalem during the eighth century BCE. For Latter-day Saints, this presents a direct challenge for traditionally held paradigms concerning the Book of Mormon, since some of this material is not only attributed to Isaiah, it has had a significant impact upon the Book of Mormon. If mainstream scholars are correct then this material would not have been available to Lehi’s family as something they could have taken with them to America.