Claudia and the Phantom Phone Calls is the second book in The Baby-Sitter's Club series by Ann M. Martin. The baby-sitters receive mysterious phone calls while babysitting, and Claudia is sure it's The Phantom Caller, a sneaky jewel thief. At the end, they discover that the mysterious caller is far from being the Phantom Caller.
A jewel thief nicknamed The Phantom Caller has been operating in areas near to Stoneybrook. He steals jewelry and calls people's homes to find out if anyone's home (if there is and someone answers, he doesn't say anything) and he sometimes calls more than once. He waits for them to go out and when/if they do, he robs them of their precious items (that he knows about because they have talked about it) and leaves. He mostly does it to wealthy people. If they don't leave the house, he will rob them anyway and is so quiet, you don't even know he's there. The baby sitters hear about his recent robberies in cities close to Stoneybrook and decide to take action. They make sure they know where every BSC member is sitting and when and set up burglar alarms and secret codes, just in case The Phantom Caller, or any burglar, comes to the houses' they are baby sitting at. Claudia and the rest of the BSC members get the calls that start to be just annoying... and then creepy... Who's stalking The Baby Sitters Club? And is it...The Phantom Caller? Is Stoneybrook next on his list?
The BSC is getting ready for the school dance and decide if they should go or stay home. They wonder what to wear, who to ask, ect and Claudia has her eyes on her recent crush, Trevor Sandbourne! Will he notice her?
Kristy, Claudia, Mary Anne, and Stacey have had some strange adventures since they started the Baby-sifters Club. But nothings been as spooky as what's going on right now. The baby-sitters have been getting mysterious phone calls when they're out on their jobs. When a phone rings and they pick up, there's no one on the other end of the line.
Claudia's sure it's the Phantom Caller, a jewel thief who's been operating in the area. Claudia has always liked reading mysteries, but she doesn't like it when they happen to her. So she and the baby-sitters decide to take action — with some very mixed results!