I almost put The Mockingbirds down after the first clumsy page or two, but I stuck with it, and am glad I did. It's the story of date rape and students taking the law into their own hands because the school administration is too impressed with itself to acknowledge and address the school's imperfections. The rapist is a water polo player, for dog's sake!
Unlike the showy ambiguity in Liar, the conflicting ideas about justice in The Mockingbirds are thoughtful and understated. You don't even know if the protagonist and the secret society are doing the Right thing, but you can understand how you would if you were in their position. Plus sophomore Amy, current head Mockingbird, is something of a riot grrrl. There's lots of great girl-love and support in the novel, too--a good message for teens and tweens to absorb.