Karen's Secret is the 33rd book in the Baby-Sitters Little Sister series.
Back Cover SummaryEdit
Karen is a loudmouth. That is no secret. But Karen loves to hear secrets. So Natalie tells her a very important one. It's a secret that Karen is not supposed to tell anyone. But she does. And when Natalie finds out that Karen blabbed her secret, she is mad. Everyone else in Ms. Colman's class is mad, too.
Now none of Karen's friends will tell her a secret. They won't even talk to her!