When Kristy Thomas has the great idea to form a baby-sitters club - a chance to earn money and spend time with her friends, all while doing something they each love to do - she has no idea how much the club will change everything. Crank calls, uncontrollable toddlers, wild pets, untruthful clients...running a business is hard work! Kristy and her co-founders, Mary Anne, Claudia, and Stacey, are sure they can handle anything. But only if they stick together....

Stacey doesn't like to tell everyone that she has diabetes. Her friends in the Baby-Sitters Club are supportive, but Stacey has lost other friends who didn't understand her condition. Stacey's parents don't seem to understand, either; they're constantly taking her to new doctors. The truth is, she likes her doctor and just wants to spend her time being a normal girl and hanging out with the Club. Can Stacey find the courage to be honest - with everyone? 

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! 

As the newest member of the BSC, Dawn is eager to prove herself. So when a big job comes along, she jumps at the chance to show everyone what she's made of. The Barretts are even more challenging than Dawn expected. The house is a mess, Mrs. Barrett is unreliable, and the kids are out of control. Dawn knows she's a great baby-sitter, but this is impossible! She only knows one thing for sure - a member of the BSC never gives up! 

Kristy's mom is getting married, and everyone is coming to town to help, bringing their kids with them. Fourteen kids! Kristy is sure she and Stacey, Claudia, Mary Anne, and Dawn can handle it - they're professional baby-sitters after all, and Kristy's mom has offered them a lot of money to take on such a big job.

But will a week of changing diapers, stopping fights, solving mix-ups, and keeping 14 children entertained prove to be too much for the BSC? Can they keep things under control for Kristy's big day?

Stacey and Mary Anne are baby-sitting for the Pike family for two weeks at the New Jersey shore. Things are great in Sea City: There's a gorgeous house right on the beach, a boardwalk, plenty of sun and sand...and the cutest boy Stacey has ever seen! Mary Anne thinks that Stacey should leave Scott alone and focus on the Pike kids, but Stacey's in love. Looking for reasons to hang around his lifeguard stand takes up all of her time, which means Mary Anne has to do the job of two baby-sitters.

Mary Anne used to have to wear her hair in braids, keep her room painted pink, and ask her dad before she did anything. But not anymore. Mary Anne's been growing up...and the Baby-Sitters Club members aren't the only ones who have noticed. Logan Bruno 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 BSC has never been this complicated - or this fun!

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?

Oh no! Stacey McGill is moving back to New York! That means no more Stoneybrook Middle School, no more Charlotte Johanssen, and worst of all...no more Baby-Sitters Club!

After Kristy's mom got married, her family moved to Watson's house in a new neighborhood. But the kids there aren't very friendly - in fact, they're total snobs! They criticize Kristy's clothes, make fun of the Baby-Sitters Club...and worst of all, they laugh at Louie, Kristy's pet collie, who's going blind. Nobody does that and gets away with it! Kristy's fighting mad, and she's not going to put up with a Snob Attack any longer - and neither is the BSC!

Mallory Pike has always wanted to be a member of the Baby-Sitters Club - they're so much fun to be around, and she's practically a baby-sitter already. Now the club members have invited Mallory to a meeting. This might be her big chance! But the BSC isn't making it easy - they make Mal feel like a baby on a job, and make her take an impossible written test. Mallory's beginning to think she doesn't want to be a part of the BSC...or maybe she and her new friend Jessi should start a club of their own. It's time to show those baby-sitters what a couple of new girls can do!

Lately, it seems like each of the baby-sitters besides Dawn has been singled out...and she's a little jealous. But now it's Dawn's turn to shine: Mrs. Pike has asked her to help prepare Margo and Claire for the Little Miss Stoneybrook contest! Dawn's going to do everything she can to help her charges win, even if Margo's only talent is peeling a banana with her feet. But then Kristy, Mary Anne, and Claudia are helping Karen, Myriah, and Charlotte enter the contest, too. It's hard to tell whether the competition is fiercer at the pageant - or in the BSC!

At long last, Dawn's mother and Mary Anne's father have decided to get married! 

A bunch of kids at Stoneybrook Elementary have pen pals at a school in New Mexico. The baby-sitters love hearing the letters that Charlotte, Becca, and the Pike kids get from their new friends.

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 do what the note says. But who sent the charm? And why send it to Mary Anne? If the BSC doesn't solve this mystery soon, their bad luck might never stop!