This book should really be titled "Muddying the Waters: Why Epistemological Trickery Teaches Us That We Can't Definitively Know Anything About Anything."
The brethren who present their views in this compilation of nonsense flatly reject the majority LDS view of who exactly the Lamanites are. Jeffrey Meldrum and his limited geography model would be unfamiliar to most in-the-pew Mormons, who, like myself, are very well acquainted with the words of various prophets and apostles on this matter. The following quote shows perhaps a willing ignorance on the issue, "A tradition apparently has persisted in the Latter-day Saint community, from the time the Book of Mormon first appeared in print in the 19th century, that all Native Americans are Lehi's direct descendants" (161). One need only look at Spencer W. Kimball's talk "The Day of the Lamanites" to see that this was not merely a spurious tradition, it was the firm belief of the majority of the church from 1830 to 2007 (when the "among the ancestors" change appeared in the BoM) and beyond. As recently as 2011, President Uchtdorf declared the crowd gathered at a Guatemalan temple dedication to be, "Truly children of our wonderful Father Lehi" (From the Church News article "Children of Lehi Share Their Cultural Heritage").
The reasons why the apologists in this compilation appear ignorant of common Mormon belief is not at all confusing. They are aware of the DNA evidence which appears to contradict Book of Mormon claims, and they have taken up the fight to maintain belief at all costs (that is, after all, the primary function of apologetics). If there are waters which can be muddied, they do all in their power to muddy them. Unfortunately, what we are left with after their little slight of hand is completed is a view of Mormonism which is wholly unfamiliar to Mormons themselves.
What this work absolutely fails to address is the fact that chapel Mormons and their divinely-inspired leaders were absolutely sure of the identity of the Lamanites for more than 150 years before the DNA challenge to the Book of Mormon even needed to addressed. When you disregard the firm belief of millions of your fellow Mormons, one is left to wonder at the enormous cost of your apologetic trickery. It would be so much better to just remain on the faith train and claim, "There will be evidence for our belief someday, but not today." When the apologists enter the world of actual scientific discussion, it quickly becomes apparent that they haven't a leg to stand on. All they are relying on are claims that we don't know who anyone is, where they come from, and why DNA doesn't show us what we think it does. This acquired ignorance when the facts contradict belief is at least suspicious if not absolute proof of high levels of cognitive dissonance. Interestingly, the cognitive dissonance disappears when one accepts that the Book of Mormon is not at all historical.