Southern California is ground zero for upwardly mobile middle-class Latinas. Matriarchs like Mercy Amado—despite her drunken, philandering (now ex-) husband—could raise three daughters and become a teacher. Now she watches helplessly as her daughters drift apart as adults. The Latino bonds of familia don't seem to hold. Celeste, the oldest daughter who won't speak to the youngest, is fiercely intelligent and proud. She has fled the uncertainty of her growing up in Los...