The gripping new thriller from the best-selling author of Saving Sophie.

Stephanie is scared for her life. Her psychologist, Connie Summers, wants to help her face her fears, but Connie will never really understand her. Stephanie's past has been wiped away for her own protection. Stephanie isn't even her real name. But then, Dr Summers isn't Connie's real name either.

And that's not all the women have in common. As Stephanie opens up about her troubled relationship with her brother, Connie is forced to confront her own dark family secrets.

When a mutilated body is dumped in plain sight, it will have devastating consequences for both women.

Who is the victim?

Who is to blame?

Who is next?

Gripping and tense, Bad Sister will have fans of Sue Fortin, B A Paris and Linda Green hooked till the final moment.