Karen's Twin is the 45th book in the Baby-Sitters Little Sister series.
Back Cover SummaryEdit
Tammy and Terri are real-live twins in Karen's class. Audrey thinks that is neat. She wants to be a twin, too. And her twin is going to be Karen.
Karen likes being Audrey's twin at first. But then Audrey does everything just like Karen. She dresses like her, she talks like her, and she even looks like Karen! How can there be two Karens at once?