The premise of the book is that relatively few readers of the Book of Mormon, whether Mormons or non-Mormons, study the book to understand it as a composition in its own right. People mostly give it a quick read to confirm their belief\disblief in the LDS or Mormon Church's claim to be divinely organized and run. The author feels that in reading the Book of Mormon that way, much of the meaning and almost all of the nuances of the book are missed completely. His effort treats the Book of Mormon as susceptible to the same analysis as is used on works of historical fiction.
He makes the point a number of times, that it makes no difference to understanding Mormon's motivations, as to whether he was a literary creation of Joseph Smith or a true historical figure. This will, no doubt, irritate both some believers and some non-believers, who want to proceed quickly to a conclusion about the origin of the Book of Mormon and therefore the validity of the LDS Church as a divinely organized church.
As the key to understanding the Book of Mormon, this book discusses the three main narrators: Nephi, Mormon and Moroni, beginning with their different narrative styles and aims. Many examples are given to support the book's assertion that the narrators' lives influenced their style and aims. Nephi, for example, wrote his portion later in his life, after he knew that his lineage would fail and die out. His writings were intended to inspire the descendants of his unrighteous brothers. Mormon, on the other hand, was the historian, who, in addition to the careful recording of important names, places and events, selected a number of comparisons of good followers with inspired followers. His point was to underscore the importance of divine inspiration. Again, whether the Book of Mormon is fiction or history, is irrelevant to the discussion. The point is: how well do the stories hang together? Do they achieve the writer's intent?
I especially enjoyed the non-dogmatic approach taken on this subject, and would recommend this book to anyone who wants to take a more in-depth look at the Book of Mormon. There are some points the author raises that will be a little uncomfortable for the reader, whether Mormon or non-Mormon. Ultimately, however, the author leaves it to you to make your own conlusions, but with a better appreciation of the Book of Mormon than you started with.