I feel like this book kept stating that Gretchen was a sociopath, rather than subtly proving it to us through her thoughts and actions. The time and perspective switches were nice, especially giving us a view into the tenuous household of Reed and Claire. I kept thinking that the plot was going to twist, but it truly never does. Everything is laid out to us by the author if you're reading carefully enough, without much need for additional thought. If you're not into thrillers or like to see what's coming, you might still enjoy it. Despite its flaws, I still did find it compulsively readable.