Cady has just turned sixteen, and she’s sure that at least two important events are about to happen in her life. First, she’ll finally get a boyfriend. Second, something else truly meaningful will occur—something that will change everything.
Cady has been friends with Rosie for so many years that their bond seemed unbreakable. But when the new school year begins, the friendship doesn’t just develop a crack—it opens a real gap, named Susan. New to the school, she’s beautiful, smart, and instantly becomes everyone’s favorite. And it seems like Susan has decided to take Cady’s place—to become Rosie’s closest friend.