Claudia's sure it is the phantom phone caller who has been operating as a jewel thief in the area. So she and the baby-sitters decide to take action against him and get some very mixed results.

One of the baby sitters discovers an old diary in an antique trunk in Stacey's attic. The diary belonged to a girl who lived in Stacey's house in the 1890s and says there may be ghosts in the house.

Dawn begins to get threatening notes and odd phone calls while she is babysitting. She is scared, but she is afraid she will lose the Sitter of the Month Contest if she tells anyone.

Stacey is shocked when a new family accuses her of staling a valuable ring them when she was baby-sitting. stacey would never take anything from anyone!

An odd series of accidents has the members of the Baby-sitters Club half-way believing they are being stalked, but when they head to Shadow Lake for a ski weekend and the incidents continue, they realize they are all in danger.

Visiting a huge seaside mansion in Maine while caring for six young charges, Kristy, Claudia, Mary Anne, and Dawn are disturbed at the location's decidedly spooky nature and further alarmed by strange noises and a ghostly figure. Ann M. Martin is the creator of The Baby-sitters Club, which has more than 190 million books in print, making it one of the most popular series in the history of publishing. Her novels include A Corner of the Universe...

When Abby signs the BSC up to help reopen a country club that's been closed for twenty years, the girls find a mystery to clear away as well as cobwebs.

Abby comes home from school one day to find that someone has left a beautiful baby boy on her front porch, and while Abby's mom convinces the police to let the baby stay with them until his mother can be found, her friends in the Baby-Sitters Club decide to conduct their own investigation.

Stacey has a great time running the eighth-grade fund-raiser selling "valentine-grams" until the bag of valentine grams is stolen and the contents are made public.