by Jane O'Connor and Robin Preiss-Glasser
When Nancy's parents win an all-expenses-paid vacation, Nancy and JoJo get to sleep over at their neighbor's home, Mrs. DeVine's. But JoJo is a little nervous to sleep at someone else's house luckily Nancy is an expert on sleepovers and can help prepare her little sister. The big night arrives, and JoJo and Nancy have a blast at Mrs. DeVine's. But when it's time for bed, it turns out Nancy wasn't as prepared as she thought. Good thing there is nothing better than a sister to make you feel better.
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