The seventh book in a hilarious chapter book series about an accidental rule breaker from Katherine Applegate, Newbery Medal-winning and bestselling author of The One and Only Ivan, Endling, and Wishtree. If Roscoe guesses the weight of a giant pumpkin, he'll win a bunch of new books for the school library and a ton of candy Easy, right? But a little black cat keeps trying to cross his path Will the bad-luck kitty jinx...