Ironically, I was just finishing one of Kelly Long's books and my husband was telling me that he cannot believe that there is *that* much to write about in relation to the Amish because I am constantly reading Amish fiction. I looked at him and gave him the "Oh no you didn't..." look... I think it is one of those things that a person actually has to witness. It is beyond WHAT the Amish do, their language, their dress....their belief system. Each book is about an individual or community's conflict within themselves, so to speak. When I open the books, I am comofrted by the Amish surroundings and the familiarities of what to expect while empathizing with the character or characters as they undergo an, often, spiritual journey that ultimately makes their lives more positive. I doubt the hubby is ever going to sit down and read Amish fiction (I suppose more surprising things have happened...), but at least he understands my perspective a little better. ;)
By the way, in your particular series in discussion, Leah has been my favorite, by far, with Sarah next. I don't know what it was, but those two stories were just amazing to me. :)