When Kristy, Claudia, Mary Anne, and Stacey, the members of the Baby-sitters Club, each receive mysterious calls while they are working, they decide to find out who is responsible.

Poor Stacey. She's moved to a new town. She's still coming to terms with her diabetes. She's facing baby-sitting problems left and right. And her parents are no help. Luckily, Stacey has three new, true friends -- Kristy, Claudia, and Mary Anne. Together they're the BSC -- and they will deal with whatever's thrown their way ... even if it's a rival baby-sitting club!

"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-sitter's 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?"--Provided...

"Mary Anne has never been a leader of the BSC. So when a fight breaks out among the club's four members, Mary Anne feels a little lost, unable to depend on Kristy, Stacey, or Claudia anymore. Sitting by herself in the cafeteria is bad enough; when Mary Anne has to baby-sit a sick child without any help from the club, she knows someone has to take action. It's time for Mary Anne to step in and save the day!"--Page 4 of cover.

Dawn is sure there's a ghost in her house and so are the other baby-sitters. But they're so busy with their baby-sitting jobs that they hardly have time for a ghost hunt. Will the mystery ever be solved?

Feeling isolated as the only African American in her sixth grade class, Jessi gains a sense of belonging by participating in the Baby-sitters Club, learning sign language in order to communicate with a deaf child, and dancing in a ballet.

"It used to be that Mary Anne's dad was really strict, but not anymore. Mary Anne's been growing up...but that's not the only big news for the Baby-sitters Club. There's a new boy in school named Logan Bruno, and he likes Mary Anne! He has a dreamy Southern accent, he's awfully cute--and he wants to join the Baby-sitters Club. The Baby-sitters aren't sure Logan will make a good club member. And Mary Anne thinks she's too shy for Logan. Life in the...

"Claudia has a sad goodbye to make. Her grandmother, Mimi, has just died. Claudia understands that Mimi was sick for a long time, but she's still mad at her grandmother for leaving her. Who will help Claudia with her homework . . . and share "special tea" with her? To keep from thinking about Mimi, Claudia spends all her free time painting and baby-sitting. She's even teaching an art class for some of the kids in the neighborhood. Claudia knows...

"They're lean, they're mean, they're the pride of Stoneybrook. Who are they? They're Kristy's Krushers! When Kristy sees how much her little brothers and sister want to play on a softball team, she starts a ragtag team of her own. Maybe Kristy's Krushers aren't world champions (how could they be, with Jackie Rodowsky, walking disaster, playing for them?), but nobody beats them when it comes to team spirit. Now Bart's Bashers have challenged the Krushers...

It's time for an emergency meeting of the Baby-sitters Club when Mary Anne's little kitten, Tigger disappears.