There is little sugar but lots of spice in journalist Rachel Simmons's brave and brilliant book that skewers the stereotype of girls as the kinder, gentler gender. Odd Girl Out begins with the premise that girls are socialized to be sweet with a double bind: they must value friendships; but they must not express the anger that might destroy them. Lacking cultural permission to acknowledge conflict, girls develop what Simmons calls "a hidden culture of silent and indirect aggression." The author, who visited 30 schools and talked to 300 girls, catalogues chilling and heartbreaking acts of aggression, including the silent treatment, note-passing, glaring, gossiping, ganging up, fashion police, and being nice in private/mean in public. She decodes the vocabulary of these sneak attacks, explaining, for example, three ways to parse the meaning of "I'm fat." Simmons is a gifted writer who is skilled at describing destructive patterns and prescribing clear-cut strategies for parents, teachers, and girls to resist them. "The heart of resistance is truth telling," advises Simmons. She guides readers to nurture emotional honesty in girls and to discover a language for public discussions of bullying. She offers innovative ideas for changing the dynamics of the classroom, sample dialogues for talking to daughters, and exercises for girls and their friends to explore and resolve messy feelings and conflicts head-on. One intriguing chapter contrasts truth telling in white middle class, African-American, Latino, and working-class communities. Odd Girl Out is that rare book with the power to touch individual lives and transform the culture that constrains girls--and boys--from speaking the truth.