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.