I just started reading this book. Wife and I were at the local library a few weeks ago and she pulled it out of a shelf, almost by chance it was this book about Mormons. She did not read it much but said that it looks like a good read. I read the summary and it picked my interest. Talked about a son going back to the religion he once left in order to attempt to rescue her mother from the dead penalty.
When we got back home she was researching the book so I went ahead and bought it online. I am reading it and I could almost replace every character with a JW instead of a Mormon and, if it wasn't for the polygamy part, the book would continue to make sense.
Another piece that could help her wake up. Steven Hassan has said that the best way to wake up a loved one is to compare cults. This could do the trick.
Wish me luck