Although I strenuously disagree with almost all the points Richard Turley has made above, he did identify five minor errors in Under the Banner of Heaven that I would like to acknowledge:

Alluding to an observation I made about the Hill Cumorah Pageant in Chapter Six, Turley scolds, "Without citing a source, [Krakauer] exaggeratingly asserts that 'sooner or later most Latter-day Saints make a pilgrimage there.[sic]' Although the pageant is popular, most Latter-day Saints have never attended it, and most never will."