They all fall down

Hannah had a perfect life in London--a loving husband, a great job--until she did something shocking. Something that she doesn't quite understand herself; and now she has landed herself in a high-risk psychiatric unit. Since Hannah has been admitted, two women have died...She is convinced there's a serial killer picking off the patients one by one, passing their deaths off as suicides. But why? And who will believe her?"--Dust jacket flap.