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 Roscoe and ruin his chance to win?

Roscoe and his comical misadventures will appeal to fans of Megan McDonald's Stink series; Nancy Krulik's George Brown, Class Clown series; Rebecca Elliott's Owl Diaries series; and Dan Gutman's My Weirder School series.