"She'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 Train"-- "A debut psychological thriller--in the vein of GONE GIRL or GIRL ON A TRAIN--that focuses on a mommy blogger, her best friend who disappears suddenly, and the latter's husband--with betrayals and reversals, a dead body, and the ever-revolving question of who is duping whom"-- When her best friend asks Stephanie to pick up her son after school, she happily says yes. Her son, Miles, and Emily's Nick are classmates and best friends. A widow and stay-at-home mommy blogger living in woodsy suburban Connecticut, Stephanie knows that Emily, a PR executive, has a job in Manhattan that demands much of her time. But Emily doesn't come back. Stephanie reaches out to Emily's husband, the handsome, reticent Sean, offering emotional support. When they receive news that Emily is dead, Stephanie begins to see that nothing is as simple as it seems.