3.5 stars 
 The first half of this book was difficult to get into because I couldn't buy the premise of two 26-year-old women still harboring such petty high school issues. But then, just as I was about to give up on it, it took off into a page-turning story, and the tension climbed up a notch. Though none of the characters were particularly likable, I did want to see how things turned out for them.