Fiction by Paula Daly.
Okay, I believe I have just run through Paula Daly's entire body of work in the past week or two. Theses are some great thrillers!!
Like the book Saving Grace by Jane Green, which caused me great anxiety a few years ago, this story involves a trusted friend who turns into an evil husband-stealing witch. So it also inspires a bit of the "Oh-No-I-Can't-Look-Syndrome," but it does a better job of countering my need to anxiously fling away the book with my stronger need to FIND OUT WHAT HAPPENS NEXT!!
It's a great book!
I also read recently by this author: The Trophy Child