Claudia's not worried when she hears her newest baby-sitting charge, Betsy, is a great practical joker. After all, how much harm can one girl do? As it turns out - plenty! Claudia breaks her leg because of one of Betsy's mean jokes...and now she's talking about quitting the club. Baby-sitting might be too dangerous. The rest of the BSC decides that Betsy needs to be taught a lesson - and the joke war is on!

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!

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!

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!

Jessi knows a secret language! She learned it from Matt Braddock, the BSC's newest charge. Matt's been deaf since birth, and he uses sign language to speak. Since Jessi is Matt's baby-sitter, she's been using sign language, too. Soon all the kids in Stoneybrook want to learn to sign...which keeps the baby-sitters busy. Jessi's the busiest of all: she working on another secret just for Matt. Will she be able to keep the secret and pull off her special event?

Stacey's so excited! She's invited her friends in the Baby-Sitters Club to New York City for a long weekend. It's going to be perfect - a party and a sleepover on Friday, a big baby-sitting job on Saturday, and lot of sightseeing on Sunday. But what a mistake! The BSC is way out of place in the big city. Mary Anne sounds like a walking guide book, Dawn is afraid of everything, Kristy can't keep her mouth shut, and Claudia is jealous of Stacey's friends. Can Stacey be in the BSC anymore?

Claudia has always been the most outrageous girl in her class...until Ashley Wyeth comes along. Ashley's really different - she dresses in hippie clothes, wears six earrings and work boots, and is the most fantastic artist Claudia has ever met. Ashley says Claudia has artistic talent, too, but thinks Claudia should spend more time on her "calling" and stop wasting time on the Baby-Sitters Club. The baby-sitters are sick of Ashley Wyeth, and they feel like Claudia is a traitor. Claudia has to decide: either the BSC or the new girl - one of them's got to go!

Mallory discovers that the terrible twins she baby-sits on a regular basis are not really bad - they just want to be treated as individuals.

The members of the Baby-Sitters Club come to the rescue to help Mary Anne search for her beloved kitten, Tigger, who has suddenly vanished.

When Kristy sees how much her little brothers and sisters want to play on a softball team, she organizes a ragtag team of her own. They may not be champions, with Jackie Rodowsky, walking disaster, on the team, but at least they have team spirit! Now Bart's Bashers have challenged Kristy's Krushers to a game. The Bashers really are lean and mean...but the worst part of it all is that Kristy has a giant crush on the Bashers' coach.

Visiting her father on the west coast, Dawn is tempted to stay with him when she enjoys the beach, Disneyland, and a wealth of healthy restaurants, but the homesick baby-sitter fears leaving her mother and all of her friends.

Mother's Day is coming up and the baby-sitters have the same problem they do every year: What do they get their mothers? Kristy, especially, wants to do something nice for her mom. Mrs. Brewer has been acting kind of strange and secretive lately, and Kristy's worried about her.... But then Kristy gets another one of her great ideas. Why don't the baby-sitters treat their moms - and the mothers of the kids they sit for - to a day off without any kids around? The BSC plans a gigantic baby-sitting party.

Stoneybrook has gone star-crazy! Derek Masters, an eight-year-old regular on a hit TV sitcom, has moved to town. Everyone's wondering what a real-live TV star will be like - will he drive to school in a limo? Jessi can't believe it, but even stars need baby-sitters, and she's the lucky club member to watch Derek Masters. Even though a lot of kids at school call Derek a spoiled brat, Jessi likes him immediately. He rides bikes and eats junk food like a normal kid, but he has exciting stories about Hollywood, too! Maybe Jessi would like to be a star, too!

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.

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