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. 

When Jessi's mom goes back to work, Aunt Cecilia moves in with the Ramseys to help out. Jessi is mortified that she has a baby-sitter and can't stand her aunt's bossy ways. 

To a New York City girl like Stacey, the fact that an old - supposedly haunted - house in Stoneybrook is being torn down is no big deal. But then her friend Kristy discovers the house was built on a graveyard, and when Stacey sees a horrible face in one of the windows, she wonders if the house really could be haunted!

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!

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!

Claudia, who has always been very different from her sister, comes to the conclusion that she must be adopted. 

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?

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?

Kristy believes that the autistic child she sits for is normal enough to attend special ed classes at school. After a while though, she realizes that Susan would be better off with children like herself. 

Dawn and Mary Anne are finally stepsisters and also roommates. When they begin to get on each other's nerves, Dawn comes up with a solution which pleases everyone. 

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.

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

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!

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!

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.