The third installment of the exquisite new series from Newbery Honor winner Ann M. Martin follows Francie, Dana's daughter, to Princeton, NJ, in the 1980s.

While Karen is visiting her little-house family in Chicago, there is a robbery in their building. Karen decides to solve the mystery, so she makes a list of suspects, looks for clues, and soon she thinks she knows who the burglar is.

The Baby-sitters Club investigates the terrible noises coming from the old Hennessey place, which is sitting on top of a graveyard and may be haunted.

When Karen and Andrew's mother and stepfather plan to move to Chicago for an extended period, they decide to take Andrew with them, but let Karen decide whether to go or to stay with her father in Connecticut. Karen's decision is complicated by her promise to Andrew that they would stay together, no matter what.

The Baby-sitters think the Cat Burglar is on the loose in Stoneybrook when a cache of diamonds disappears. But other clues point to different conclusions, and the police take a very surprising suspect into custody. Now it's up to the Baby-sitters to sort out the real clues from the fakes.

For New Year's Eve, Karen thinks everyone should make a promise. Hannie is going to stop biting her nails. Kristy promises not to talk to her boyfriend on the phone so much. And Karen makes the most promises of all -- nine! But pretty soon, everyone starts breaking their promises. And her brothers and sisters are calling Karen a spy! Poor Karen. Why is everyone being bad except her?

Karen and her big-house family are going to Shadow Lake--and Nancy and Hannie are coming too! There is so much for the Three Musketeers to do. They can tell stories around the fireplace, play in their secret playhouse, and practise for the big fishing contest. Now, if Karen could just catch that Shadow Lake Monster ...