The New York Times – Liesl Schillinger
…a taut, hold-your-breath-and-your-handkerchief thriller…Like Kate Atkinson, Patricia Highsmith and Ruth Rendell, Lupton builds suspense not only around the causes and details of her story's brutal denouement, but also around the personalities and motivations of those who lunge and those who duck…Both tear-jerking and spine-tingling, Sister provides an adrenaline rush that could cause a chill on the sunniest afternoon…