Can an Enemy Be a Child's Friend?

In sixth grade they were unlikely friends, the good kid and the bad one, the girl who studied and the one who smoked in the alley. They hung out; they met for lunch. They even walked home from school together, one watching, awestruck, while the other ducked into drugstores to shoplift lip gloss, cigarettes, candy. It couldn't last. One morning in seventh grade, a nasty note appeared on the tough girl's locker -- and someone told her the writer was her cautious friend. [ABSTRACT FROM PUBLISHER]