Mary Anne's Revenge — Ann M. Martin

Look out, Cokie!
Even though Cokie Mason has never been nice to her, Mary Anne has always tried to be nice to Cokie. But this time Cokie's gone too far. Mary Anne isn't going to sit back and take it anymore. She's going to have her revenge -- with a little help from her friends.

Cokie Mason thinks she can be the Queen of Mean. But now Mary Anne's going to show her the price of not being nice.