For fans of Pretty Little Liars, Little Monsters is a new psychological thriller, from the author of The Darkest Corners, about about how when you're the new girl in town, you can't trust anyone, especially other teenage girls.   Kacey is the new girl in Broken Falls. When she moved in with her father, she stepped into a brand-new life. A life with a stepbrother, a stepmother, and strangest of all, an adoring younger half sister.   Kacey's new life is eerily charming compared