I've read the first three of these books, and have finally decided that though they are well-written (those reviewers who mention typos & grammar issues must've picked up on something I missed, as I think I recall one typo in all three books) overall, I simply do not like them. While they do drag in areas, for the most part the author has done a good bit of very nice writing. I'd love to see the author ditch this series and focus on non-religious fiction. This is very much a split review, I know.
So, good writing aside, I do feel that the author is trying to straddle a line between being "factual" and titillating (both in a traditional sense and in an almost equally prurient "outsider peeking into a closed society" sense) but the books are filled with subtle (and sometimes not-so-subtle) mainstream LDS proselytizing. If that's your cuppa, great, enjoy. But considering these are not filed under a religious category, it is frankly pretty annoying to be hit over the head with some of the subject matter that is written as fact (w/out any spoilers, I'm just saying that the whole David storyline was deeply irritating).
In short, as we get to know the characters better, the less I liked - or related to - any of them. Perhaps that is my own prejudice showing, perhaps it is the author's intent for whatever reason. Perhaps because I am not LDS, fundamentalist Morman or a member of a Judeo-Christian organized religion I simply can't get into that groove. So, I appreciate Amazon's .99 cent special for the first three in the series, but I wouldn't recommend them to any of my friends for any more, or less, than that.