Back to School for Rotten Ralph — Jack Gantos

The character Rotten Ralph was created more than twenty years ago. Now the worlds most rotten cat and his friend, Sarah, set out again on a variety of capricious capers. In three brand-new boisterously entertaining stories, Rotten Ralph is sure to weasel his way into the hearts of another generation of readers. In Back to School for Rotten Ralph, summer is over, and Sarah cant wait to start school and make some new friendsother than her rotten cat, Ralph. But Ralph wants to be Sarahs only friend, and he won't be left behind. When Sarah boards the school bus, he disguises himself as a student, follows her to class, and starts his scheme of sabotage. Ralphs plan works brilliantly until his true identity is revealed and the entire class wants to be friends with Sarah and Ralph!