"This chilling psychological suspense novel--think Strangers on a Train for the modern age--explores the dark side of love and the unbreakable ties that bind two sisters together. Felix and Tilda seem like the perfect couple: young and in love, a financier and a beautiful up-and-coming starlet. But behind their flawless facade, not everything is as it seems. Callie, Tilda's unassuming twin, has watched her sister visibly shrink under Felix's domineering love. She has looked on silently as Tilda stopped working, nearly stopped eating, and turned into a neat freak, with mugs wrapped in Saran Wrap and suspicious syringes hidden in the bathroom trash. She knows about Felix's uncontrollable rages, and has seen the bruises on the white skin of her sister's arms. Worried about the psychological hold that Felix seems to have over Tilda, Callie joins an Internet support group for victims of abuse and their friends. However, things spiral out of control and she starts to doubt her own judgment w