The hit series is back, to charm and inspire another generation of baby-sitters! When Dawn starts getting threatening notes and odd phone calls while she's baby-sitting, she doesn't know what to do. The notes are signed "Mr. X," and they're beginning to get scary. Normally, she'd tell the rest of the BSC, but this time things are different.The kids at Stoneybrook Elementary are having a Sitter of the Month Contest. The Sitter of the Month has to be someone who is in control--someone whose jobs always go smoothly. Dawn doesn't want to blow her chances at winning. But what if she's in real danger?The best friends you'll ever have are detectives, too!

Fearing that someone is stalking them after a series of dangerous accidents, the Baby-sitters escape for a skiing weekend but become petrified when the trouble follows them and points to someone from their past.

Back in California for the surfing competition, Dawn must soon solve a mystery involving a missing surfer, a mangled surfboard, and a ghost who surfs at night.

The hit series is back, to charm and inspire another generation of baby-sitters! One night when Mallory is baby-sitting for the Craines, she hears a cat crying somewhere in the house. But the Craines don't own a pet. So Mallory and the girls go exploring--and discover a mysterious white cat hiding in the attic. They name him Ghost Cat, and the mystery is solved. They think.Until Mallory and the girls continue to hear eerie cries coming from the attic. If Ghost Cat is sitting right there with them, then who--or what--is upstairs?The best friends you'll ever have are detectives, too!

While visiting Stoneybrook's new museum, Claudia is horrified to learn that someone has stolen some priceless coins and replaced them with forgeries.