Baby-Sitters Little Sister #9 : Karen's Sleepover - Paperback

It's fun to be a Baby-sitters Little Sister! Karen's having her first sleepover ever! She and her friends are going to tell spooky stories, try on makeup, and raid the refrigerator. But then Karen and Nancy get into a big fight. Karen doesn't want Nancy to come to her party. A new girl comes instead, and she is no fun! What will Karen do now?