A brand-new Baby-sitters Club graphic novel adapted by newcomer Arley Nopra！ Claudia isn't worried when she hears her newest baby-sitting charge， Betsy Sobak， is a big practical joker。 After all， how much harm can one little girl do？ Plenty。 Claudia breaks her leg as a result of one of Betsy's jokes。 Now Claudia is feeling like baby-sitting might be too dangerous and she's talking about quitting the club。 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！