Everyone's favorite baby-sitters solve mysteries, too! Something odd is going on at the Kishis'. First, Claudia's room is ransacked. Then she discovers some of ther things are missing. What would someone want with Claudia's old stuff? Weird things have been happening with Claudia's sister Janine, too. Janine has been getting suspicious packages in the mail, and she even got caught lying to their parents! Claudia doesn't know what's going on at her house. But things are going to changee with the Baby-sitters on the case! 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.