"Claudia's sister, Janine, is too busy being smart to be nice to anyone-- even their grandmother, Mimi. But Claudia doesn't have to see Janine too much this summer since the Baby-sitters Club is starting a new play group. It's going to be so much fun! But then Mimi has a stroke, and the whole summer changes. Now Claudia is "Mimi-sitting" and Janine is no help at all. How can the Kishi sisters get along when Janine is always so mean?" --Back cover....

At the urging of a very artistic new girl who encourages Claudia to practice art instead of caring for kids, Claudia considers leaving the club and the other members give her an ultimatum.

Mary Anne should never have thrown away that chain letter she got in the mail. Ever since she did, bad things have been happening to everyone in the Baby-sitters Club. With Halloween coming up, Mary Anne's even more worried -- what kind of spooky thing will happen next? Then Mary Anne finds a new note in her mailbox: Wear this bad-luck charm, it says. OR ELSE. Mary Anne has to follow the note's instructions. But who sent the charm? And why did they...

Kristy's family moves to a new neighborhood where the kids make fun of Louie, Kristy's pet collie, who's going blind. The Baby-sitters are not going to let them get away with it.

Jessi recently moved to Stoneybrook and is one of the newest members of The Baby-sitters Club. She's getting ready to start regularly sitting for the BSC's newest charge, Matt Braddock. Matt has been Deaf since birth and uses sign language to communicate, so Jessi has to use it, too. It's a secret language! Soon all the neighborhood kids want to learn how to sign, which keeps the BSC busy. Jessi's the busiest of all -- she's preparing for her dance...

Joining the Baby-sitter's Club after moving to a new town, Stacey helps her new friends outmaneuver a rival sitter group while coming to terms with her diabetes.