Stacey's class is selling "valentine-grams", packets of secret messages and candy that kids can send to each other. When someone steals the bag of messages, Stacey becomes a super sleuth to find the culprit and save Valentine's Day.

From the author of The Baby-Sitters Club: Facing a family tragedy, Sunny builds a wall around her heart—so she doesn’t fall apart. Sunny’s mom isn’t getting better. In fact, her health (along with her mind) is deteriorating quickly. When Sunny turns to her best friend, Dawn, for support, it seems like all she gets is guilt. It doesn’t help that Dawn seems to connect better with Sunny’s mom than Sunny does, or that her dad is still so absorbed with work that he is never home. But at least there is one adult whom she can talk to—Dawn’s pregnant stepmom, Carol. And Sunny has a stream of guys knocking at her door to keep her occupied. But none of that can replace her mom—and if she lets herself think about it, she may not be able to keep going. This ebook features an illustrated personal history of Ann M. Martin, including rare images from the author’s collection. Sunny: Diary Two is the 6th book in the California Diaries, which also includes Ducky: Diary One and Dawn: Diary Two.

Someone is breaking into houses in Kristy and Abby's neighborhood. Meanwhile, Mallory is struggling to help a woman who has suddenly appeared in town with no identification and no memory. In New York City Stacey and Claudia are being followed. And someone is leaving very odd, unsettling gifts and Stacey's door.

Everyone in the Baby-sitters Club remembers Lou McNally as the worst kid ever. But now she's back and, to Abby's surprise, acting a little too perfect.

When Stacey gets caught with a counterfeit ten dollar bill, the Baby-sitters search for the crook spreading phony money around Stoneybrook.

It's the biggest crime in Stoneybrook history--one of the town's mansions is missing! Kristy and Co. are hot on the trail of the Cat Burglar, who left his sign at the scene of the crime.

When the Baby-sitters are assigned jobs at Washington Mall for a school class, they soon learn of some pretty bad things going on. Is it safe to shop at Washington Mall anymore? The Baby-sitters don't know -- but they're going to make sure this mystery is solved!