Karen's Big Lie is the 38th book in the Baby-Sitters Little Sister series.
Back Cover SummaryEdit
Karen did not mean to cheat off of Ricky. But she was just not ready for Ms. Colman's surprise math quizzes. And Ricky's paper was right there.
When her teacher and her friend Hannie ask Karen if she has been cheating, she says no. A big lie! What will she do if everyone finds out the truth?