Experienced sitter Claudia isn’t worried when she hears that her newest baby-sitting charge, Betsy Sobak, is a big practical joker. After all, how much harm can one little girl do? Plenty, it turns out. When Claudia breaks her leg as a result of one of Betsy’s jokes, she begins to think that baby-sitting might be too dangerous and is talking about quitting the club. Fellow sitter Kristy thinks Betsy needs to be taught a lesson, and that the baby-sitters are just the ones to do it! Watch out, Betsy Sobak – the joke war is on! This latest story in the popular graphic novel series will delight both old fans and new.