There's always someone to do things with, and she likes to help take care of her younger brothers and sisters. But now Mallory's working on an important writing project, and she needs peace and quiet. So why won't everyone leave her alone? Nicky needs help tying his shoes, Claire wants a sandwich, someone has to break up the triplets' fight, and Mallory feels like a full-time baby-sitter. And there's only one thing to do: This baby-sitter is going on strike!

Little Rosie Wilder is perfect at everything. She can sing and dance, she plays several musical instruments, and her IQ is so high it's off the scale. So how did Claudia "C-" Kishi get stuck baby-sitting for Rosie the genius? It's because Rosie is so obnoxious that no one gets along with her - not even Claudia's sister, who's a genius, too. The baby-sitters think that Rosie needs to be taught a good lesson. But maybe what Rosie really needs is a good friend...like Claudia. 

It was good for Mary Anne and Logan to break up for a while. Mary Anne had some time to herself, and she's been having lots of fun with her friends. But now Mary Anne can't help it. She misses Logan. When she and Logan are both assigned to study their favorite author, Mary Anne thinks it will be the perfect, most romantic way for them to get back together. Until Cokie Mason, Mary Anne's mortal enemy, decides to steal Logan from her!

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.

The baby-sitters just love little babies. So of course Kristy has the great idea of entering a float in the Stoneybrook Baby Parade. All the girls have to do is round up a bunch of adorable babies like Squirt and Emily Michelle, dress them in costumes, and plop them on a float. Easy, right? Wrong. The float looks like a big orange blob, the costumes are hideous, and the babies won't stop crying. S.O.S. - the baby-sitters' float is about to sink!

Naturally, Jessi is thrilled when she earns the lead role her in dance school's latest ballet. But someone in class wants her out of the show. First Jessi's toe shoes are stolen. Then she gets all kinds of threatening messages! What kind of ballerina would want to scare Jessi? The baby-sitters don't know, but they're not going to let anyone get away with it for long.

Lately, the pressure's really been on Stacey. She hasn't been feeling well, her schoolwork and baby-sitting jobs are almost out of control, and she's sick of being in the middle of her parents' fights. Then it happens: Stacey ends up in the hospital because of her diabetes. The baby-sitters are worried. So is Stacey. Why are things always so hard?

The baby-sitters love getting new clients. So when the Lowells contact the club, everyone is thrilled. For Mary Anne, sitting for the Lowells is a snap, and the kids are adorable and obedient. But when Claudia meets the family, Mrs. Lowell will barely look her in the eye, and the kids are downright rude! The next time Mrs. Lowell calls the BSC, she requests another sitter - anyone but Claudia. Claudia has no idea what she did wrong, but the BSC won't rest until they find out!

For once, Claudia's studied really hard for her math test. And when she gets her paper back, it has an A- on it. All right! But then Claudia's math teacher calls her to his desk and accuses her of copying off of Shawna Riverson's test. Claudia can't believe it, and neither can the baby-sitters. Claudia would never cheat! And they're not going to rest until they help clear Claudia's name!

There's some bad news in the Pike family: Mallory's dad has just lost his job. And since money is going to be tight until Mr. Pike finds a new job, all eight of the Pike kids decide to help out. Nicky gets a paper route, Vanessa tries selling her poetry, and Mallory takes a baby-sitting job in Kristy's ritzy neighborhood. But being around the Delaneys only makes Mallory feel poor. They have a cat that cost $400 and tennis courts in their backyard! Poor Mallory - she needs the Baby-sitters now more than ever!

Jessi is honored - and surprised - when she's asked to participate in a synchronized swimming competition. Sure, Jessi knows ballet. But water ballet is a different story. All that swimming is hard work! Jessi and her partner practice their routines over and over again. Everyone - especially the baby-sitters - is expecting them to win the gold. But Jessi's not so sure she can do it....

Of all the babysitters, Kristy's the last one anyone would expect to have a secret admirer. But someone is sending her mushy notes with hearts all over them. 

Mary Anne can't stop thinking about babies. First she starts baby-sitting for a pair of adorable baby twins. Then she and Dawn decide it would be great to have a baby brother or sister of their own. But Mary Anne learns that taking care of a baby is a big responsibility when she and Logan have to pretend to be parents to an egg "baby" for a class at school. Sammie, their egg, has to be watched every second, and Mary Anne and Logan barely have time to breathe. Taking care of a baby isn't all it's cracked up to be!

Mallory loves horses. She loves reading about them. She loves writing about them. And most of all, she loves daydreaming about them.

Kristy's not too happy with some things at Stoneybrook Middle School. The hot lunches, for example, look like dog food, and Mary Poppins is such a babyish choice for their annual play. What the eighth grade really needs is a new class president. Someone who's organized and has great ideas - someone like Kristy! But can Kristy coach a softball team, keep up her grades, baby-sit, run the BSC, and be president? The baby-sitters are about to find out!