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. 

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?

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!

Dawn tries to give herself a new image by changing her hair, makeup, clothes, and personality, but then she worries about whether her friends and her penpal Lewis will like the new Dawn. 

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!

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!

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!

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!

Lately, Mary Anne's been feeling like she and Logan are spending too much time together. They fight over silly things. And Mary Anne never gets to do what she wants to do - like read, and baby-sit, and be with her friends. But when Mary Anne suggests that she and Logan see less of each other, Logan takes it all the wrong way. Could this really be the end for Mary Anne and Logan?

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.

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!

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.

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.

Mary Anne and Stacey are in Sea City working as mother's helpers for the Pike family. When each of the girls meets up with her boyfriend from last summer, things start to get complicated.

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.