While spending two weeks at the New Jersey shore as mother's helpers, Mary Anne objects when Stacey neglects her babysitting duties after falling in love with Scott the lifeguard.

"Claudia's not worried when she hears her newest baby-sitting charge, Betsy Sobak, is a great practical joker. After all, how much harm can one little girl do? Plenty. Claudia breaks her leg as a result of one of Betsy's mean jokes... and now she's talking about quitting the club. Baby-sitting, she says, is just too dangerous. Kristy thinks Betsy needs to be taught a lesson. She also thinks the Baby-sitters are just the ones to do it. Watch out,...

A new boy in school, Logan Bruno, wants to join the Baby-sitters Club, while Mary Anne finds her feelings for Logan are complicated, to say the least.

"Claudia's sister, Janine, is too busy being smart to be nice to anyone-- even their grandmother, Mimi. But Claudia doesn't have to see Janine too much this summer since the Baby-sitters Club is starting a new play group. It's going to be so much fun! But then Mimi has a stroke, and the whole summer changes. Now Claudia is "Mimi-sitting" and Janine is no help at all. How can the Kishi sisters get along when Janine is always so mean?"--P. [4] of cover....

The summer that Hattie turns twelve, she meets the childlike uncle she never knew and becomes friends with a girl who works at the carnival that comes to Hattie's small town.

Some of the kids at Stoneybrook Elementary have pen pals at a school in New Mexico. When word comes that the school in New Mexico has burned down, Dawn decides to organize a fund-raiser for the fire victims, and reward generous givers with a gigantic sleepover.

Rose Howard is obsessed with homonyms. She's thrilled that her own name is a homonym, and she purposely gave her dog Rain a name with two homonyms (Reign, Rein) which, according to Rose's rules of homonyms, is very special. Struggling with Asperger's, Rose shares a bond with her beloved dog, but when the dog goes missing during a storm, Rose is forced to confront the limits of her comfort levels, even if it means leaving her routines in order to search...

Kristy comes up with the idea for the Baby-sitters Club to hold a day camp during summer vacation, but the camp turns out to be way more trouble than the girls had anticipated.