This article is about the original novel. For the Netflix episode, see Claudia and the Phantom Phone Calls (episode). 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. Kristy, Claudia, Mary Anne, and Stacey have had som