A simple favor A Novel.

Soon to be a major motion picture from Lionsgate starring Anna Kendrick, Blake Lively and Henry Golding, and directed by Paul FeigShe's your best friend. She knows all your secrets. That's why she's so dangerous.A single mother's life is turned upside down when her best friend vanishes in this chilling debut thriller in the vein of Gone Girl and The Girl on the TrainchesIt starts with a simple favor-an ordinary kindness mothers do for one another...