Karen's Ghost (Baby-sitters Little Sister #12)

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It's fun to be a Baby-sitters' Little Sister! Karen thinks there's a ghost in her house! But she's never really seen the ghost of Old Ben Brewer -- until now. Karen and her stepsister Kristy have found out that Ben Brewer and his spooky friends are going to have a birthday party in her attic on Halloween night! It used to be fun having a ghost around. But now Karen's not so sure!