Karen Brewer's imagination gets the best of her when she decides that her neighbor, Mrs. Porter--who has wild gray hair, wears black robes, and has a garden full of mysterious herbs--must be a witch.

When her mother's remarriage takes her family into a much wealthier neighborhood, thirteen-year-old Kristy finds herself surrounded by snobbish girls who compare clothes, make fun of the Baby-sitters Club, and insult her aging dog.

When a fight breaks out among the members of the Baby-sitters Club, timid Mary Anne finds herself becoming more assertive as a baby sitter and in her relationships with her father and friends.

"Claudia and her sister, Janine, may as well be from two different planets. Claudia, who pays more attention to her artwork and The Baby-sitters Club than her homework, feels like she can't compete with her perfect sister. Janine studies nonstop, gets straight As, and even takes college-level courses! But when something unexpected happens to the most beloved person in their family, will the sisters be able to put aside their differences?"--

Dawn, the newest member of the Baby-sitters Club, gets more than she bargained for when her first job turns into a disaster and she has problems with Kristy.

"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 follow the note's instructions. But who sent the charm? And why did they...

Kristy's family moves to a new neighborhood where the kids make fun of Louie, Kristy's pet collie, who's going blind. The Baby-sitters are not going to let them get away with it.

"Claudia has always been the most creative kid in her class... until Ashley Wyeth comes along. Ashley's really different: She wears hippie clothes and has multiple earrings, and she's the most fantastic artist Claudia has ever met. Ashley says Claudia is a great artist, too, but thinks she's wasting her artistic talent with The Baby-sitters Club. When Claudia starts spending more time with Ashley and missing BSC meetings, it becomes clear that Claudia...

When her friends from the Baby-sitters Club come for a visit in NYC, Stacey realizes they feel out of place in the big city and must find a way to keep the weekend from becoming a complete disaster.

Karen is having a terrible day. Her new jeans are missing, there's no prize in the Crunch-O's box, and Boo-Boo the cat won't play with her. She even gets punished and sent to her room! Karen tries everything to make her day better, but nothing is going right, and her bad luck just won't go away. Will this be the worst day ever?