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! Ann M. Martin is the creator of The Baby-sitters Club, which has more than 190 million books in print, making it one of the most popular series in the history of publishing. Her novels include A Corner of the Universe (a Newbery Honor Book), Belle Teal , Here Today , A Dog's Life , On Christmas Eve , and the Main Street and Family Tree series, as well as the much-loved collaborations P.S. Longer Letter Later and Snail Mail No More with Paula Danziger. Ann lives in upstate New York.