When%20Nancy’s%20parents%20win%20an%20all-expenses-paid%20vacation%2C%20Nancy%20and%20JoJo%20get%20to%20sleep%20over%20at%20their%20neighbor’s%20home%2C%20Mrs.%20DeVine’s.%20But%20JoJo%20is%20a%20little%20nervous%20to%20sleep%20at%20someone%20else’s%20house%20–%20luckily%2C%20Nancy%20is%20an%20expert%20on%20sleepovers%20and%20can%20help%20prepare%20her%20little%20sister.The%20big%20night%20arrives%2C%20and%20JoJo%20and%20Nancy%20have%20a%20blast%20at%20Mrs.%20DeVine’s.%20But%20when%20it’s%20time%20for%20bed%2C%20it%20turns%20out%20Nancy%20wasn’t%20as%20prepared%20as%20she%20thought.%20Good%20thing%20there%20is%20nothing%20better%20than%20a%20sister%20to%20make%20you%20feel%20better.Perfect%20for%20fans%20of%20the%20Eloise%2C%20Olivia%2C%20and%20other%20Fancy%20Nancy%20books.